Showing 314 events within 150 km in the next 365 days. Page 13 of 16.
Sat, Oct 03, 2026
128 km from Tabernash10k 50k Ultra
Sat, Oct 03, 2026 at 8:00 AM
The Wildcat Mountain Trail Races showcase some of the most scenic terrain in the HRCA Backcountry Wilderness Area, giving runners a true taste of the rolling hills, open views, and natural beauty
surrounding Wildcat Mountain. Each fall, participants take on two distances—a 10-mile and a 10K—designed to highlight the area’s unique, beautiful trails.
The race begins at the Douglas County East/West Trailhead at Rocky Heights Middle School and follows the E/W Trail into the Backcountry, linking directly into the Wildcat Mountain trails.
Adult registration includes:
Dry-fit race t-shirt
Custom race bib
Custom finisher medal
Pancake breakfast from Flippin' Flapjacks
Post-race beers compliments of Living the Dream Brewing
Kids’ Races
Race day will end with a series of untimed, just-for-fun kids’ races, giving young runners an easy and exciting way to be part of race day. Our goal is to create a safe, welcoming introduction to trail running, and these short races offer the perfect opportunity for kids ages 0–12 to get involved. Registration is only $10, and every participant receives a finisher medal.
Distances vary by age to ensure a fun and manageable experience for all: Ages 2–4 run approximately 0.25 miles, Ages 5–7 run about 0.62 miles, Ages 8–10 take on roughly 1 mile, and Ages 11–12 complete a 2-mile course.
Kids' registration includes:
Custom race bib
Custom finisher medal
10k 10 Miles Run Trail
Sat, Oct 03, 2026 at 8:00 AM
Join us for the annual Spooky Sprint 5k/10k & Half Marathon! A fun, Halloween-themed event that is perfect for the whole family.
The fun includes -
Great Swag - designer shirt & custom medal
Chip-timing with live results and awards
Free photos
Delicious Treats waiting at the finish line
Plenty of fun!
Grab your friends and family, you are not going to want to miss this one!
Can't make the race? No problem! We offer a virtual race option where you can run anywhere, at any time, and still earn the fun swag!
*Youth-based pricing for the 5k/10k, 12 & Under are only $17!
Half Marathon registration includes a custom bib, designer shirt, awesome finisher medal!
10k registration includes a custom bib, designer shirt, and awesome finisher medal!
5k registration includes a custom bib, designer shirt, and an awesome finisher medal!
1 Mile registration is untimed and includes a custom bib, designer shirt, and an awesome finisher medal!
The kid's dash is a fun, untimed dash for our kiddos ages 10 and under. Registration includes a mini bib, youth-sized shirt, and a specifically crafted medal for our kids' dash event! (If your child wants to run the kid's dash, and doesn't want the SWAG, they are welcome to run with us on race day for free!)
*Register by midnight on Thursday, two Thursdays before race day, to guarantee your shirt!
1 Miles 3.1 Miles 6.2 Miles 13.1 Miles Run Sprint Virtual
Sat, Oct 03, 2026 at 8:30 AM
With the Fall Season, Estes Park shines in colors and wilderness experiences! Herds of Elk begin to roam the meadows and open fields; while sounds of bugling Bull Elk call out their territory. Join
us as we acknowledge this unique season at the RUT RUN 5K as part of ‘ELK FEST’. Kick starting the weekend of events, the 5K (3.1 miles) race offers a short and scenic tour of fall colors, river views, and possible Elk encounters (from a safe distance).
Our fabulously scenic, downhill course that starts from Fish Hatchery Road on the Fall River Trail and finishes at downtown’s Performance Park continues!
Runners, joggers, walkers, and strollers will be transported from the Estes Park Visitor Center by the “Hiker Shuttle” to the Start area on Fish Hatchery Road. Following the winding and scenic path, you will enjoy the radiant golden Aspen colors, hear Fall River and pass by the historic Elkhorn Lodge. This run will quickly ignite your senses and appreciation for nature and its splendor. After the run, participants can purchase various delicious foods from nearby restaurant BIG HORN CAFE, several restaurants along Elkhorn Ave or Food Trucks at Elk Fest in Bond Park. All runners receive a complimentary beer token for the Elk Fest festivities!
5k Run Trail
Sat, Oct 03, 2026 at 9:00 AM
You CAN 5k. This event is for EVERY ONE. EVERY BODY.
You won't get lost. You won't get forgotten. You'll run (or jog or walk or crawl) a clearly marked 5k course with friendly volunteers pointing the
way! We're going to keep you motivated and safe along the way. When you're done we'll be at the finish line with a huge smile and a high five to celebrate YOU, because YOU CAN 5k!!
Leading up to your race, you'll champion others to donate to one of the local event charities. As your donations grow, so does your swag bag!
3.1 Miles 5k Run Walk
Sat, Oct 03, 2026 at 9:00 AM
This race will serve as the end of the SSRS pointed season where series winners will be announced. Please be present to pick up awards.
This race is a fundraiser for the Boys & Girls Club.
This races
offers two distances on Emerald Mountain, 12k (ends up being closer to 7.75 miles long) and a 4 mile run. This scenic course will begin at the base of Howelsen Hill and tour Emerald Mountain through aspen lined single track. Hikers are welcomed in the 12k. For race questions, please reach out to Race Director, Sarah Krakoff at [email protected] or [email protected]
4 Miles 12k Run Trail
Sun, Oct 04, 2026
Colorado’s varied landscapes, including lakes and mountain trails, provide an ideal setting for Swimrun, offering a mix of adventure, physical challenge, and mental stimulation that appeals to athletes seeking a new and exciting experience.
Run Swim SwimRun Trail
Sun, Oct 04, 2026 at 7:00 AM
VISIT OUR RACE WEBSITE - CLICK HERE
Run Swim SwimRun
Sun, Oct 04, 2026 at 7:00 AM
Welcome to the Windsor Marathon. This event starts and ends at The Island at Pelican Lakes in Water Valley, with a great after party including breakfast, drinks and music. Tour beautiful Windsor on a
variety of terrain, through golf courses, along the Poudre River trail, up and down hills, and event single track dirt trails for the marathon.
There's a distance for everyone with a kids fun run, 5k, 10k, half and full marathon. This year's races benefits Banner MD Anderson Cancer Center and the Weld RE-4 Foundation. Create a team and let's show our strength in numbers!
1 Miles 3.1 Miles 5k 6.2 Miles 10k 13.1 Miles 26.2 Miles Fun Run Half Marathon Run Trail
Sun, Oct 04, 2026 at 8:30 AM
Rocky Mountain Road Runners holds a monthly Trophy Series in the Denver area. We provide a low-key, low-cost racing environment. Everyone is welcome to run with us!
The 8mi race uses a handicap start
system, slow-to-fast, spread over ~45 minutes. This gives everyone a chance to win. We'll use your estimated finish time to assign you a start time with others the same speed.
All 5k racers will start ~15min after the first 8mi starters.
Our October race is at Star K Ranch, in Aurora, along the mostly dirt Sand Creek path.
Race Day Details
Time: 8:30am + handicap start for the 8mi. All 5km racers start ~15 minutes after the first 8mi starter. Show up 30-45 minutes early to get your bib and warm up!
Location: Star K Ranch/Morrison Nature Center, in Aurora
Course: The race runs on the mostly wide dirt path along the Sand Creek.
Both courses are out and back, slightly uphill out and downhill back.
5k 8 Miles Run
Sun, Oct 04, 2026 at 9:00 AM
Join us on Sunday, October 4, for a Halloween themed 5K run or walk beginning at Koch park and winding through the Marolt foot path and open space with your furry friends, or without! This is a timed
race with cash prizes for top 3 female and male finishers. All net proceeds benefit the Friend of the Aspen Animal Shelter. Please have your pets come in costume! There will be prizes for best costumes, raffle prizes, food trucks.
Entry Fees:
*Adults – $65
Kids (12 and under) – $25
*Includes a Rubey Rescue Run insulated water bottle + other sponsor goodies
3.1 Miles Run Walk
Sat, Oct 10, 2026
57.9 km from Tabernash1 Mile 5k 10k 22k Marathon Road Run
Sat, Oct 10, 2026 at 7:30 AM
Join us on a journey from Fort Collins to Loveland. The marathon begins at Edora Park in Fort Collins and ends at Fairgrounds Park in Loveland. The half-marathon starts at Fossil Creek Park and also
ends at Fairgrounds Park in Loveland. Along the way, whether in the half or the full, enjoy stunning mountain views as you piece together sections of the newly completed Long View and Front Range bike paths.
On a side note, when shirts are sold out, please come to the finish line merch after your race. We ALWAYS have shirts at the finish line for those who were unable to grab one during registration.
5k 13.1 Miles 26.2 Miles Marathon Run
Sat, Oct 10, 2026 at 9:00 AM
3rd annual Manitou 5K! Come celebrate the beauty of Manitou Springs! Race starts and ends in Fields park. Run along the rolling creek, view the art along the Creekwalk, loop the beautiful parks full
of murals, sculptures, disc golf, skateparks and more. The path is flat and accessible to all. Run/walk. Bring your family, bring your neighbor, bring your friends! See map attached. Chip timed by Pikes Peak Road Runners (PPRR). T-shirt designed by MSSD14 art students! All proceeds go to Manitou Springs School District.
5k Run Walk
Sun, Oct 11, 2026
Ready to take on an awe-inspiring challenge? 🌟 Come and join the Run the Rocks Park and Amphitheatre in Morrison, a 5 km course that will energize you in the heart of nature 💪.
5k Run
Sun, Oct 11, 2026 at 8:00 AM
Join the WESTY HALF and 5k this fall!
The Hometown Race Series features half marathons and 5k distance events in outlying communities outside the Denver and Boulder metro areas.
Whatever distance
you're ready to tackle, we'll be there with you to celebrate at the finish line! This is one of the few 5k events where FINISHER MEDALS are awarded to each participant. Go home with proof of your pride and show off that bling!
5k 13.1 Miles Run
Sat, Oct 17, 2026 at 6:00 AM
The Human Potential Running Series Presents
The Indian Creek Trail Runs @ Indian Creek Campground
The Indian Creek Trail Runs is the oldest official race of HPRS and is also known as our annual “Fall
Classic.” This event features some of the best, seldom used, single track trails of the Denver Metro area. Participants will travel through the lower and upper montane ecosystems of the Front Range; from the lodgepole pine forest around 6,000-8,000′ sprinkled with sprawling aspen groves, down to the tall grasses and red rocks of the lower montane areas around 5,000′. This time of year is known for the changing colors across Colorado’s landscape. From golden quaking aspen, to the bright red hues of low lying scrub oak, and the amber waves of tall grasses of America’s high prairie.
You’ll find it hard to believe that you’re so close to a major city, one that you can see from the many viewpoints along the route. While you admire glimpses of the city, you’ll also see the same red rock formations that make up the Red Rocks Amphitheater, and occasional glimpses of nearby 14ers that tower above the Colorado landscape.
5.5 Miles 15 Miles 35 Miles 54 Miles Run Trail
Sat, Oct 17, 2026 at 7:00 AM
Welcome to the Blue Sky Trail Marathon & Half, Fort Collins's original and only trail marathon.
Taking place on the trails between Horsetooth Mountain Park and the Devil's Backbone Open Space, the
course takes you on a north-south tour of the easternmost hogbacks of Northern Colorado's mighty Front Range.
The marathon boasts 3,500 feet of elevation gain/loss, while the half marathon checks in at 1,800 feet, and the route offers a little bit of something for everyone. It is designed to appeal to both veteran trail runners and those looking to experience their first trail racing adventure. The generous nine hour cut-off should ensure a successful day for everyone.
The course is 100% dirt and 90% sweet Colorado singletrack. The terrain ranges in difficulty from smooth dirt trail to technical rock gardens. A small portion of the route is on smooth dirt road (no motor vehicle access) and gravel bike path, with the meat of the running done on the beautiful and distinctive redstone hardpack of the Blue Sky Trail.
After the race, kick back and enjoy the always-popular barbecue and generous sponsor giveaways.
Start: Blue Sky Trailhead, Horsetooth Mountain Park. Fort Collins, Colorado
Distance: 26.7 miles (3,500') or 13.4 miles (1,800')
Min/Max Elevation: 5,300'-6,500'
Average Elevation: 5,700' Marathon
Terrain: Marathon: 22mi dirt singletrack, 3mi rocky singletrack, 2mi dirt road; Half Marathon: 13.0mi dirt singletrack, 0.5mi dirt road
Fauna: Deer, abert squirrel, golden eagle
Registration Cap: 400 Marathon / 400 Half
Time Allowance: 9 hours Marathon / 6 hours Half Marathon
Dates: Marathon: Oct 17, 2026; Half Marathon: Oct 18, 2026
Trail Sisters Approved
Registration
Fees for the 2026 Blue Sky Marathon & Half Marathon are as follows:
Marathon:
Dec 15 – Feb 28: $110 + $7.60 fee
March 1– June 30: $120 + $8.20 fee
July 1 – Oct 17: $130 + $8.80 fee
Packet Pickup: $145
Half Marathon:
Dec 15 – Feb 28: $90 + $6.40 fee
March 1– June 30: $100 + $7.00 fee
July 1 – Oct 17: $110 + $7.60 fee
What You Get in Return for Your Registration Fee:
A beautiful, challenging and well-marked course on some of the best trails in Fort Collins
Enthusiastic, knowledgeable race and aid station volunteers
Fully stocked aid stations
Free entry to Larimer County Open Space for the day
Generous Cut-Offs (Marathon: 9hrs / Half 6hrs)
Gender specific race T-shirt
Unique finisher award and overall and age group awards
Finish line meal
Waiting List
In the event that the race sells out, we will maintain a waiting list and transfer runners from the waiting list to the race roster should other runners already registered not be able to attend.
Transfer Credit Policy
If you are not able to race, we will be able to offer a race transfer credit that can be applied to any future Gnar Runners race (valid for 12 months). Credit deadlines are as follows:
Until March 31: 100% credit of registration (excluding RunSignup fees)
April 1 - July 31: 75% credit of registration (excluding RunSignup fees)
August 1 - October 15: 50% credit of registration (excluding RunSignup fees)
**In order to receive your credit, you must cancel your registration through the RunSignup registration platform.
Deferrals:
Log in to your RunSignup account
Go to Profile -> Upcoming Races -> Blue Sky -> Manage Registration
At the bottom of the page, select “Defer Registration” and follow the automated process.
While RunSignup will prompt you to, you DO NOT have to immediately choose which race to apply your credit to. Once you hit "Confirm Deferral" and see the "Your registration has been deferred" message, your credit is in the system and will be valid for one year past the event date.
Distance Switch:
Log on to your RunSignup account
Go to Profile -> Upcoming Races -> Blue Sky -> Manage Registration
At the top, click the link to "Transfer Event"
Follow the steps to register for the race in the new distance
Runners in the half marathon race can pay the additional registration fee to upgrade to the marathon race. There is no charge for marathon runners dropping down to the half marathon race.
The online deadline to transfer is Thursday (10/16) at midnight. It can also be done in person at packet pickup on Friday.
Cancellation & Refund Policy
Entries are non-refundable. Entries are non-transferable, except for transfers via the wait list. In the event the race is cancelled due to extreme weather, fire, disease or for some other unforeseeable event, we cannot offer refunds or credits.
Course & Aid Stations
Course Maps
Blue Sky Trail Marathon Course Map
Blue Sky Half Marathon Course Map
Course GPX Files
Blue Sky Marathon GPX (Current for 2025)
Blue Sky Half Marathon GPX (Current for 2025)
Elevation Profiles
Blue Sky Trail Marathon Elevation Profile Blue Sky Trail Half Marathon Elevation Profile
Marathon Aid Stations
Aid Station Mile Split Total Gain Descent Cut-Off Drop Bag Aid
Towers 4.4 4.4 1350 350 - No Fluids Only
Blue Sky (Start/Finish) 4.8 9.2 150 1150 10:00a Yes FULL
Indian Summer North 1 4.0 13.2 450 350 - No FULL
Indian Summer South 1 2.4 15.6 300 400 12:30p No FULL
Hunter Turnaround 2.3 17.9 400 250 - No Safety Only
Indian Summer South 2 2.4 20.3 250 400 1:45p No FULL
Indian Summer North 2 2.4 22.7 400 300 - No FULL
Finish 4.0 26.7 350 450 4:00p Yes FULL
Half Marathon Aid Stations
Aid Station Mile Split Total Gain Descent
Underpass 1 1.9 1.9 150 100
Indian Summer North 1 3.5 5.4 500 400
Indian Summer North 2 2.7 8.1 550 550
Underpass 2 3.5 11.6 400 500
Finish 1.9 13.4 100 150
All aid stations will offer Gnarly Nutrition Fuel2O sports drink, Hammer Gels, water and soda plus a variety salty and sweet bites, and a selection of fruit.
***There will be GF/Vegan alternatives for nearly all non-GF/V standard offerings. These are typically held back to save them for those who need them, so please ASK! Also note that while we will do our best to keep utensils and trays separated for these as well as common allergens, this is the backcountry and cross-contamination can occur.
While we will provide plenty of electrolyte options in drink mix and salty real foods, we deem the risks associated with salt in concentrated pill form to be more than we're comfortable providing. We won't restrict runners from using their own salt caps, but will not have them available at aid stations.
Time Cut-Offs
Marathon course cut-offs will be enforced at the following aid stations:
Blue Sky Aid Station (mile 9.2) at 10:00am. 3:00 total time.
Indian Summer South outbound (mile 15.6) at 12:30pm. 5:30 total time.
Indian Summer South inbound (mile 20.3) at 1:45pm. 6:45 total time.
There are no on-course cut-offs for the half marathon.
Drop Bags
Marathon runners may leave a drop bag at the Blue Sky Start/Finish to pick up at mile 9.2. We will have a tarp to set bags out. Pack your gear to stay dry in case we get any rain.
Half Marathon runners may leave a drop bag at the South Bay Start/Finish. We will have a tarp to set bags out. Pack your gear to stay dry in case we get any rain.
Please provide your own bag and keep it to a reasonable size (small duffel bag or stuff sack). Clearly label it with your name and bib number. Please do not leave any valuable items in your drop bags - volunteers are not responsible for lost items. Drop bags will not be transported to any other locations on course.
Course Marking
The courses will be well marked with pink flagging and pink pin flags. Important intersections will be supplemented with flour ground markings and directional arrows. On longer stretches of trail without intersections, confidence flagging will be placed approximately every quarter mile. Turns will be marked heavily.
Toilets
There will be ample facilities at the start/finish.
We will have an additional portable toilet at the Indian Summer North Aid.
In addition, there are park facilities that can be used in the campsite between the main Marina parking area and the start for the marathon that will be passed at marathon miles 1-2 and 8-9.
Crewing & Spectating
Half Marathon
Due to the course layout & access, there are not provisions for mid-race spectators for the half marathon.
For the Half Marathon Start/Finish, park in the South Bay parking area.
Marathon
Marathon runners are not allowed to receive assistance from crew on the course outside of the Blue Sky Start/Finish area at mile 9.2. No pacing is permitted.
Much of the marathon course is run on trails that are not easily accessible to spectators. The best viewing points are the Start/Finish line at the Blue Sky Trailhead (also marathon mile 9.2 Aid), the Soderberg Trailhead, and the Hunter Loop 18-mile turnaround.
NO Crewing is allowed at the Indian Summer North or South Aid Stations.
For the Marathon Start/Finish, park in the Marina parking area (see above) and walk over, please do not drive through or park at the start/finish.
To access the Soderberg Trailhead, from the Start/Finish, turn north on Shoreline Drive and make a left into the trailhead parking lot. If the parking lot is full, you may park in the Marina parking area and walk north through the campground to the trailhead.
To access the Hunter loop (18-mile turn), drive to the Devil's Backbone Trailhead near Loveland. Take Highway 34 West from Loveland and take a right onto Hidden Valley Rd and follow signs to the Devil's Backbone parking lot. Follow the trail north up the hill to the junction of the Wild and Hunter loops (roughly 2 miles).
The entire trail system is open to the public if you would like to spectate and encourage your runner elsewhere on course; however, crewing and pacing by foot or by bike is not allowed and will result in the disqualification of your runner.
Training
There will likely be organized training runs on Saturdays in September/October for Blue Sky. See the Fort Collins Trail Runners Facebook Group for group run postings, as well as our Community Page for suggested routes.
We also offer a basic 15-week (marathon) and 9-week (half marathon) training plan leading up to the event.
Detailed Marathon Course Directions
Start to Towers Aid (4.4mi): The start line is located at the Blue Sky Trailhead off County Road 38E, six miles west of Fort Collins. From the start, you will run north on the Blue Sky Trail through the campground 1.3 miles to the Soderberg Trailhead, continuing north on the Swan Johnson Trail to Towers Rd where you will take a left up the hill to Towers Aid.
Towers Aid to Blue Sky Aid (9.2mi): Volunteers at Towers Aid will direct you out of the aid station to turn right onto the Herrington Trail. Shortly after the turn onto Herrington you will bear LEFT onto the Stout Trail (courses split). The descent down the Stout Trail is rocky, so watch your footing, though be sure to check out the reservoir views. Stout will contour around the hillside to bring you back to Towers Rd. Turn right on Towers Rd and take another right back onto Swan Johnson south back to the Soderberg Trailhead. Continue south back through the campground to the Blue Sky Aid start/finish area.
Blue Sky Aid to Indian Summer North Aid (13.2mi): Continue south on the Blue Sky Trail. This section of the trail will be winding, rolling single track with many blind corners. Please be aware that the trail is open for public use. You will pass only one trail junction with the Rim Rock Trail. Continue straight past this intersection down the hill into the valley towards Indian Summer North Aid, which will be visible from this point on the course.
Indian Summer North Aid to Indian Summer South Aid (15.6mi): The Indian Summer North Aid is at the junction of the Indian Summer Loop. Make sure that your number is recorded at the aid station and volunteers will direct you to turn right up the hill onto the Indian Summer Trail. On completing the loop, make a right at the trail junction to turn south back onto the Blue Sky Trail. Indian Summer South Aid will be located about a quarter mile south of this intersection. This is your last chance for aid before a long and difficult 5 mile section through the Devil's Backbone side of the course. Make sure you leave with adequate water.
Indian Summer South Aid to Hunter Turnaround to Indian Summer South Aid (20.3mi): Continue south on the Blue Sky Trail. Once you pop over the hogback cliff band, the terrain becomes very rocky and technical. There are two loops to negotiate here and all you need to remember is to turn right. There is only one right way to go. At the first junction with the Laughing Horse Loop, turn right. At the end of the Laughing Horse Loop, continue straight ahead. At the second junction with the Hunter Loop, turn right. At the end of the Hunter Loop, a course marshal will record your number. Volunteers hike into this location so there will be no aid available. The course marshal will direct you to continue around the Hunter Loop, and you will return north towards the finish. On the return trip at the end of the Hunter Loop, turn right and continue north. At the next Laughing Horse Loop junction, turn right. At the end of the Laughing Horse Loop continue straight north, back down off the ridge into the
valley to Indian Summer South Aid.
Indian Summer South Aid to Indian Summer North Aid (22.7mi): From Indian Summer South Aid, you will return the way you came. About a quarter mile north of the aid station, you will turn left to go back up and over the Indian Summer Loop to Indian Summer North Aid.
Indian Summer North Aid to Finish (26.7mi): After leaving Indian Summer North Aid, you’ll have a short climb up past the Rim Rock junction. From there you’ll have just a few more miles of rolling single track to the finish.
Detailed Half Marathon Course Directions
Start to Underpass Aid (1.9mi): From the start at South Bay, follow the new Bay-to-Bay Trail around the peninsula to where it joins with the Blue Sky Trail. Turn left to head south on the Blue Sky Trail to the aid station.
Underpass Aid to Indian Summer North Aid (3.5mi): Continue on the Blue Sky Trail heading south, past the junction with the Rimrock Trail to the junction with the Indian Summer Trail where the aid station is located.
Indian Summer North Aid to Indian Summer North Aid (2.7mi): Out of the aid station, head west on the single track trail, climbing steadily up and curving south around the Indian Summer Loop. Enjoy the false summit! Bomb back downhill on the single track switchbacks until you reach a T-junction with the Blue Sky Trail. Turn left (north) and follow the single track for about a quarter mile till it junctions with the gravel road. Turn left (north) and follow the road another 0.4mi back to the aid station.
Indian Summer North Aid to Underpass Aid (3.5mi): Retrace your steps back to the start/finish. Begin by heading east/north out of the aid station on the Blue Sky Trail, continuing north under the underpass to the aid station.
Underpass Aid to FINISH (1.9mi): Continue north on the Blue Sky Trail for a very short distance, veering right at the junction onto the Bay-to-Bay Trail around the peninsula and to the Finish!
Race Rules
Race rules are designed to provide a safe and fair experience for everyone involved and to help ensure our ability to produce the race again next year. Major rule infractions by racers will result in immediate disqualification of the racer. Please do not argue with or harass our volunteers. Please direct any questions and feedback to us here.
The marathon will be limited to 9 hours and the half marathon will be limited to 6 hours. Both will start at 7:00am. Please refer to the Aid Station section of this page for intermediate marathon cut-offs. There are no intermediate half marathon cut-offs.
At each aid station, volunteers will record runner bib numbers. Runners are responsible for making sure that aid station volunteers record their number. Please make sure that your bib number is visible from the front and call out and confirm your number when passing through an aid station. This is important so that we can keep track of runners, record your intermediate race splits and know that you are not lost or injured.
If you need to drop out of the race for any reason, you must check out with the nearest aid station or course volunteer.
Purposeful littering is prohibited and will result in an immediate disqualification.
Stay on the trail. No bushwhacking or short cutting. In case of wet trail conditions, please run through any muddy sections to avoid widening the trail. Yield to pedestrian and horses. Mountain bikers should yield to runners, but please use common sense in all circumstances.
Pacers are not allowed. Crewing is allowed at designated aid stations only.
No mechanical aid (poles, traction devices, etc.) unless approved by race staff prior to the race for a specific reason.
All runners should carry a 16oz minimum water bottle or bladder that can be refilled at aid stations. There will be no water cups at aid stations.
Dogs are not allowed on the course with runners.
Schedule
Friday 10/16:
4:00-7:00p: Optional marathon & half marathon packet pick-up at Altitude Running 2531 S Shields St #2N, Fort Collins, CO 80526
Saturday 10/17:
5:30-6:45a: Marathon Race Day Packet Pickup
6:50a: Marathon Pre-Race Briefing
7:00a: Marathon Start
9:30a-4:00p: Finish Line Meal Served
10:00a: Blue Sky Aid Cut-Off - Marathon
11:30a: Overall Marathon Awards. Age Groups Offered on a Rolling Basis
12:30p Indian Summer South Aid Southbound Marathon Cut-Off
1:45p: Indian Summer South Aid Northbound Marathon Cut-Off
4:00p: Finish Cut-Off
Sunday 10/18:
5:30-6:45a: Half Marathon Race Day Packet Pickup
6:50a: Half Marathon Pre-Race Briefing
7:00a: Half Marathon Start
8:30a-1:00p: Finish Line Meal Served
9:45a Overall Awards. Age Groups Offered on a Rolling Basis
1:00p: Finish Cut-Off
Parking & Directions
Marathon
The Marathon Start/Finish line is located at the Blue Sky Trailhead off of County Road 38E across from the Horsetooth Tavern.
Parking for all participants and spectators will be located in the Inlet Bay Marina parking lot off of Shoreline Drive. It is a 0.7mi walk from the Marina to the start/finish area.
Carpools of two or more runners will be given priority parking at the Blue Sky Trailhead at the start/finish until it fills. Please carpool if you can and want priority parking.
Parking is in designated parking spaces only. There is no parking allowed in the campground areas (unless you have reserved and paid for a nearby campsite.)
Drop offs can be made at the small turnout off Shoreline Drive just around the corner from the Blue Sky Trailhead. Vehicles should not stop anywhere on the side of 38E.
Parking is not allowed anywhere on 38E, along Shoreline Drive, or on any connecting residential street.
Half Marathon
The Half Marathon Start/Finish line is located at the South Bay Pavilion off of County Road 38E. Turn in at the sign for South Bay, right after the Town of Stout sign.
Parking for all participants and spectators will also be in South Bay. Later arrivals may have a longer walk.
Parking is in designated parking spaces only. There is no parking allowed in the campground areas (unless you have reserved and paid for a nearby campsite.)
All vehicles containing registered runners will receive a park pass - good for one vehicle - as part of their entry fee upon arrival on race morning. Any other vehicles (crews/spectators) will be required to have a Larimer County Parks Annual Pass or purchase a day pass on-site for $10.
Driving Directions
Marathon: 4780 W County Road 38E, Fort Collins, Colorado, 80526
Half Marathon: 4210 W County Road 38E, Fort Collins, Colorado, 80526
13.8 Miles 26.7 Miles Gravel Half Marathon Run Trail Walk
Sat, Oct 17, 2026 at 9:00 AM
Welcome to the Great Trailhead Foot Race at Bear Creek Lake Park! Featuring legitimate TRAILS in the shadow of Denver's skyline, you'll love the single-track and dirt as you race 5 miles, or a double
lap of 10 miles to the finish line party!
Bring your ID because there's FREE BEER for 21 and up (with a valid ID)! Plus, your registration includes entry to the park for the whole day and FREE Hot Dogs, Chips, Protein Bars, N/A Beer, Bananas, and more! AND 10 Milers get a Finisher Mug!
Entry fees include the cost of entry into the park, a post-run party, and one finisher's meal!
5 Miles 10 Miles Run Trail
Sat, Oct 24, 2026 at 4:00 AM
Voted Best of the Best in Arvada for Non Profit Events by Colorado Community Media! Join the Apex Foundation for the 6th Anniversary Trick or Trot 5K, presented by Intermountain Health! Runners and
walkers of all ages and abilities are all welcome to join us for this Halloween celebration. Dress in your Halloween best for a chance to win prizes for the costume contest. Contest categories include Best 12 & Under, Best Couple, Best Group, Best Homemade, and Best Pet costumes.
There will be a separate 1-mile Trick or Trot Candy Hunt for kids 12 & under. Kids can grab candy at our designated trick or trot stations along the 1-mile course. Participants will need to register for this event specifically, as it is separate from the 5K race. Kids registered in the 5k race receive automatic entry to Halloween Hunt. One parent/guardian is encouraged to join but does not need to register. Course giveaways will be available for registered participants only.
Registered 5K participants will receive an event giveaway item, swag bag, and a chance to win great prizes!
Proceeds from this event benefit the Apex Foundation, a non-profit 501(c)3 organization whose purpose is to support Apex Park and Recreation District’s efforts to deliver quality community recreation. https://foundation.apexprd.org/who-we-are/
1 Miles 3.1 Miles 5k Run Walk