Showing 135 events within 100 km in the next 90 days. Page 5 of 7.
Wed, Jul 29, 2026 at 5:00 PM
The Highlands Ranch Mountain Bike (MTB) Series takes place on four Wednesdays throughout May-August. Each Wednesday night features a different route. All four races take place in our beautiful and
pristine Backcountry Wilderness Area, with the first three taking place on our Highlands Point Trail System and the fourth on our Wildcat Mountain Trail System.
Mountain bike racers of all abilities are welcome! All categories are for men and women.
This course consists of two 5.5-mile loops running counter-clockwise for a total length of 11 miles. Total ascent of 764 feet and a maximum elevation of 6,230 feet.
Course map: https://www.strava.com/routes/17155580
5:00 pm - Juniors 10-14 race 1-lap course
6:00 pm - all other race classes race 2-lap course
Mountain Biking Run Trail
Fri, Jul 31, 2026
52.5 km from Tabernash5k Half Marathon Run
Fri, Jul 31, 2026 at 5:30 PM
Join us at 8,410' for an all comers meet you won't forget! With distances for every ability and age, we have something for everyone! From silly and fun to fast and competitive you should come up and
see what running hard at more than a mile and half above sea level feels like!
Proceeds benefit Nederland High School Track & Field/Cross Country Teams
Presented by Peak to Peak Endurance
Full FAT timing provided by Femmer Timing
Altitude conversions provided
Brand new track surface!
Date:
Friday July 31st @5:30pm
Location:
Nederland Middle/Senior High School
Events:
Kids 400m & 800m hay bale steeplechase, 400, 800, 1600, 5k and Seltzer mile (both relay and individual)
5k Run
Sat, Aug 01, 2026 at 8:00 AM
8.6 km from TabernashCycling Gravel
Sat, Aug 01, 2026
12.6 km from Tabernash10k 21k 50k Ultra
Sat, Aug 01, 2026
58.9 km from TabernashRun Trail
Sat, Aug 01, 2026 at 11:59 PM
59.6 km from TabernashCycling
Sat, Aug 01, 2026 at 8:00 AM
60.9 km from TabernashCriterium Cycling
Sat, Aug 01, 2026 at 6:00 AM
The Human Potential Running Series Presents:
The Sheep Mountain Trail Runs @ Fairplay, CO
Come ready my friends, this mountain throws everything it has at trail and ultra runners alike, challenging
you from start to finish at an average elevation over 10,600′. You’ll run amongst these “beautifully difficult” mountains and hills lining the western slope of the South Park Valley. This is the race where you carry #Adversity on your back, if you can handle the burden, you can win the day! Runners looking for a wilderness experience, stunning views, opportunities for technical terrain mixed with remote forest service roads… will fall in love with this course. The Sheep Mountain 50 mile and 50k promises to provide runners with an unforgettable experience that celebrates the history, and rough and tumble nature of this mountain region. The Sheep Mountain Half Marathon is a wonderful introduction into trail running for those looking for a more mellow day. The course features flowing dirt county roads and USFS Fire Road (some of a little rocky).
14.2 Miles 33 Miles 53.1 Miles Run Trail Ultra
Sat, Aug 01, 2026 at 8:00 AM
HOW REGISTRATION WORKS
The event is comprised of 24, 1-hour games in a row and is open to men's and women's teams of all ages and abilities. Every team that registers plays in at least one, 1-hour
game and will be matched with an opposing team of similar age and abilities
If you register as a dual-slot, your team will have the entire hour with no opposing team schedule, and choose how you wish to play for that hour.
Sat, Aug 01, 2026 at 8:00 AM
Ready to get off the sofa and gallop around Highlands Ranch with some friends? Yeah, you are! Come frolic with us at the Unicorn Runner 5k in Highlands Ranch to finish off your summer! You'll earn a
sweet tee shirt and a flashy unicorn finisher medal!
It's a 5k distance for all, and whether you walk, trot, canter or gallop, we'll be happy to see you! This event also features a shorter saunter for those not quite ready to enjoy a full 5k! The untimed 3/4 mile run is long enough to get your heart rate up and be a 'real run' without being a sprint!
Costumes are encouraged!
The Balloon Guy will be back this year- creating balloon creations for all!
Remember to refer your friends and you can earn back up to $20 back from your registration fee. Also - teams of 5 or more in the 5k each get $5 off their registration. So form a group and get your buddies to join you today!
All the info you need about this event is found on this site - click the menu bar or scroll to the bottom to see a listing of all page links!
If you're looking for the Blessing of Unicorn running early in the summer on the north side of town, CLICK HERE for the Thornton event! CLICK HERE for the DENVER-East Side Event in the spring.
All participants receive:
Gender-Specific Event Shirt!
1 Free Cotton Candy
FREE Photo downloads
FREE Balloon Animals/Designs
FREE Face Painting
5k Participants ALSO receive
Finisher's Medal!
Chip Timed Finish
3.1 Miles 5k Run Walk
Sun, Aug 02, 2026
38.9 km from TabernashRun Trail
Sun, Aug 02, 2026
89.8 km from TabernashRun
Sun, Aug 02, 2026 at 6:30 AM
Have you been dreaming of running the Boston Marathon? Need to shave a few minutes off your qualifying time? Or maybe you're just looking for the perfect course to set a new PR? Whether Boston is
your goal or not, the Bound for Boston Marathon & Half Marathon is for you.
We're racing around Northfield High School, and the course is a 1-mile super flat & super fast loop! The Full Marathon is USATF Certified making it a Boston Qualifier!
This event is uniquely designed for serious runners. We will have water and an electrolyte drink at the aid table. Participants are welcome to bring their own personalized aid to place on the aid tables, allowing you to grab exactly what you need each time you pass. Many runners even bring a cheer crew to help hand out fuel and keep the motivation high throughout the race.
To maintain the best possible experience, this is intentionally a small, focused event, capped at just 75 participants.
We will have a great race shirt and finisher medals for all participants. Awards for both distances are in the usual 5-year age groups.
Fast course, flexible support, and a chance to chase your goals—this is the race that lets you run your perfect day.
By design this will be a smaller event, focused on getting you your fastest time.
13.1 Miles 26.2 Miles Half Marathon Run
Tue, Aug 04, 2026 at 6:00 AM
Join us August 5, 12, 19 & 26 for a fun series of shorter midweek trail races.
Our goal is to offer a fun, low-key series of races designed to give newer trail runners an opportunity to dip their
toes into the trail racing waters, and to offer more experienced trail racers a chance to sharpen their speed on shorter, quicker courses. All races will start at 6:00pm, ranging in distance from 5k to 12k. Results will be tabulated according to chip times, with series points awarded for each race. Top series finishers will earn unique awards.
We'll have a wide selection of vintage Gnar race shirts, and all registrants are welcome to their pick to call their own.
After each race, we will be providing pizza with support from the Fort Collins Running Club and beverages with support from New Belgium Brewing.
Race dates and distance are as follows:
August 5: Flat and Fast Eltuck Valley 5k (250′ elevation gain)
August 12: Into the Hills Eltuck 5k (700′ elevation gain)
August 19: Into the Hills Eltuck 10k (1,700′ elevation gain)
August 26: Flat and Fast Eltuck Valley 12k (500′ elevation gain)
Start: Lory State Park, Eltuck Picnic Area, Fort Collins, Colorado
Distance: 5k - 12k
Dates: August 2026
Time: 6:00pm
Cost:
Thru 6/30: $25 each race or $80 for the series
7/1 & After: $30 each race or $100 for the series
Special pricing of $10/race for Ages 17 & Under. Price change will be automatically applied based on registrant's Date of Birth before final checkout on RunSignup.
All race participants are welcome to a free vintage shirt from previous Gnar races (your choice and as available). Awards will be given out at the end of the series to top points scorers.
We acknowledge and respect those who experience their gender identity in ways outside of the traditional male/female dichotomy, and are trying our best to provide non-binary opportunities in both the registration and results to reflect that. For the purposes of awards, non-binary runners will be eligible in their birth gender pool.
Race dates and distance are as follows. Click the race link to view the course map
Trail Sisters Approved
Transfer Credit & Distance Change Policy
If you are not able to race, we can offer a 75% race transfer credit that can be applied to any future Gnar Runners race (valid for 12 months). We can also directly transfer your entry to another race in the series for the same year, assuming the new race is not sold out. Transfers/Credits can be requested any time up until 72hrs before the start of each race in the series. To request a transfer credit please Contact Us.
Cancellation Policy
With the exception of waitlist transfers, entries are non-refundable and non-transferable. 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.
Rules
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.
If coming up on a slower runner or regular park user while on trail, please give an early verbal notice that you are approaching and wait for the hiker/runner to step off to the side before passing.
No mechanical aid (poles, traction devices, etc.) unless approved by race staff prior to the race for a specific reason.
Dogs are not allowed on the course with runners.
If you do not have an annual Colorado State Parks Pass or a pass with your vehicle registration, you will need to purchase a day pass ($10) when you enter the park.
Parking will be at the Eltuck Picnic Area until filled, after which we will direct cars to the nearby Spur Road. For those parking on the Spur Road, it will be a short walk to the start.
Bibs will be available for pick up at the race start from 5:00pm. Chips will be pre-attached to your bib. If you are running multiple races in the series, please keep your bib to reuse in your next race(s).
Aid, Etc
These are no frills, basic races. There is no on-course aid.
There are two permanent toilets at the start/finish of each race. Additionally, the Valley 5K goes past park restrooms at the 0.25 and 1.5mi marks; the Hilly 5K & 10K go past a park restroom at the 0.25mi mark, and the Valley 12K goes past park restrooms at 0.25, 3.8, 6.1 & 6.3mi marks.
5k Run Trail Walk
Thu, Aug 06, 2026 at 4:30 PM
NO Race Day Registrations
Fun for all, from newcomers of any age racing for the first time to veteran competitors looking to test their fitness, all in a friendly, welcoming environment.
Held at the
Historic Potts Field, home of the University of Colorado Track & Field Team, the facilities offer the full range of track and field events and is one of the only meets in Colorado that offer a chance to run the Steeplechase or throw the javelin.
If you've been wanting to try a track race and run in the footsteps of CU stars such as Jenny Simpson, Emma Coburn, Joe Klecker, Val Constien, Dathan Ritzenhein, Alan and Shayne Culpepper, and Kara and Adam Goucher, now is your chance!
Run
Fri, Aug 07, 2026 at 6:00 PM
Founded in 1979, the Eldorado Run for the Cure is the longest operating charitable footrace in the State of Colorado. All proceeds from the annual four-mile run benefit the Colorado Cancer
Foundation's life saving work, from funding oncology research at the University of Colorado's (CU) Division of Medical Oncology to aiding patients at the CU Hospital in Aurora, CO.
Each year, the run has developed and grown, and in 2023 a new course was introduced, routing participants along the scenic South Boulder Creek, which winds through the high cliff walls of historic Eldorado Canyon.
4 Miles Run
Sat, Aug 08, 2026 at 7:00 AM
54.1 km from TabernashCycling
Sat, Aug 08, 2026 at 6:30 PM
August may be hot...but still a great time to run, and we hope you'll come join the runners of RMRR. We'll run our August 5k on the Highline Canal around DeKoevend Park. As always, everyone is
welcome.
For August, we use a mass start rather than our standard handicap start system.
Race Day Details
Date: Friday August 4th
Time: 6:30 pm start. Show up 30 minutes early to walk from your car, get your registration info, and warm up.
Distance: 5k.
Course: Race runs on the crusher/fine dirt Highline Canal around DeKoevend Park.
Course on Strava: https://www.strava.com/segments/22931643
Location: DeKoevend Park in Centennial. We run from the pavilion behind the Goodson Recreation Center.
Google Parking Link: Goodson Rec Center Parking. Park towards the far W end of the lot.
Stick around after for our potluck BBQ. RMRR provides the grillables and non-alcoholic drinks. We ask everyone to bring a salad, side dish, or dessert to share.
5k Run Walk
Sat, Aug 08, 2026 at 7:00 AM
As the summer mornings start to cool, join us for a fantastic end-of-season celebration at our 14th annual Runapalooza! From our new venue at Colorado Tap House, you'll have the chance to tackle
relatively gentle 5K and 10K courses that go along the acclaimed Ralston Creek Trail, taking you through shady, creekside beaty along Arvada's picturesque open spaces and charming golf course communities. Or our challenging half marathon course that combines the beauty of the Ralston Creek Trail with the challenging Blunn Reservoir loop with its gorgeous Denver and Front Range views. This event, paired with its Endless Series' counterpart Mardi Crawl, offers a can't-miss opportunity to experience the best of what Colorado has to offer!
5k 10k 13.1 Miles Run Trail