Showing 55 events within 100 km in the next 30 days. Page 2 of 3.
Sat, Jun 20, 2026 at 8:00 AM
Thank YOU for supporting this wonderful cause. Sierra's 5K Run/Walk entrees include: Official Race Bib, Official Long Sleeve cotton shirt with option for tech shirt, Chick Fil A entree (1st 750 to
register), DQ coupon, Free Beer at AKA (21 & up) & FREE Meningitis Vaccinations.
Sierra's Kids Fun Run: 10 & Under A FUN and very short distance. Kid's Bib, Short sleeve cotton shirt, Chick Fil A kids meal, DQ coupon, FREE meningitis vaccination.
3.1 Miles 5k Fun Run Run Walk
Sun, Jun 21, 2026 at 2:45 PM
62.4 km from Tabernash100k Criterium Cycling
Sun, Jun 21, 2026 at 5:00 AM
Join us in beautiful Estes Park on June 20 & 21, 2026 for another beautiful weekend of events!!! Rated Top 7 scenic races in the USA by Forbes Magazine.
DOWNHILL START for MARATHON & DOWNHILL HALF
MARATHON COURSE!
Marathon & Half Marathon participants will be shuttled from the high school to the start line at the Dao House Sunday morning. Shuttle times will be selected during registration.
All races finish on the Estes Park High School track. Finisher medals for ALL events! Along with a performance race shirt (gender sizing)!
“SUNRISE ACHIEVERS”- You love to complete destination marathons but need a little more time. We offer an extra early start as a group and will have a Pacer join you to help you reach your finish goal of 6.5 hours. All Sunrise Achievers MUST be on the first bus departing the Estes Park High School at 4AM. A unique “Sunrise Achiever” race shirt will be given for these participants. THIS IS the early start for marathon walkers.
SHINING TWIN CHALLENGE- race the Longs Peak 5 Mile and the Estes Park Half Marathon and receive a special finisher medal! Please register for each event individually.
21k 42k Half Marathon Run Walk
Sun, Jun 21, 2026 at 7:30 AM
It's an annual Fathers Day tradition in Arvada! All are welcome - walkers, joggers and speed demons, too! Swag includes t-shirts for ALL participants! The Fun Run is an un-timed 1 mile out and back run/walk and the MANLY MILE is open to men and is a TIMED race!
1 Miles 5k 10k Fun Run Run Walk
Thu, Jun 25, 2026 at 10:00 AM
BACK FOR OUR 3RD YEAR!
June 26 - 28 2026 | Alma, Colorado | Elevation: 10,600 ft
Get ready for a weekend of epic outdoor adventure at 10,600 feet in beautiful Alma, Colorado—the highest incorporated
town in North America! Whether you love mountain biking, trail running, off-road duathlon, or simply camping under the stars, our grassroots dirt festival has something for everyone.
EVENT HIGHLIGHTS!
Free Kids' Bike & Run Races (ages 12 & under) - Friday, June 26 1:00 PM Alma Town Park
Mountain Bike Racing (Saturday, June 27)
OFF-Road Duathlon -Run + Bike (Saturday, June 27)
Trail Running (Sunday, June 28)
Love to run with your four-legged training partner? Leashed dogs are welcome in our Sunday Trail 10K—sign up for our special Doggie Division and hit the trails together.
THE COURSES
Our courses feature a fun mix of single-track, forest service roads, and graded county roads. Each loop includes:
✔️ Two big climbs
✔️ Fast, fun descents
✔️ Classic high-country terrain
WHAT TO EXPECT
With the Dirt Festival, you can expect a fabulous grassroots race hosted by the Alma Foundation and the Town of Alma, Colorado—one of those rare mountain communities where local pride, volunteer spirit, and genuine hospitality turn a race weekend into a shared celebration.
Camp at the start line in a pristine alpine meadow framed by 14,000-foot peaks and put your endurance and grit to the test on our demanding mountain bike and trail run courses. Prefer to focus on one discipline at a time? Ride on Saturday, run on Sunday—your weekend, your challenge.
Discounted Camping: Athletes get 50% off camping with race entry. Camping opens Thursday morning, but early arrival is welcome with a camping pass (email us in advance!).
Please bring your own water and camping essentials to be a comfy, happy camper. Porta Potties will be available in the meadow.
Race Categories & Awards:
Overall Awards: Top Men, Women & Non-Binary in each race format
Age Group Awards:
U23
24-39
40-49
50-59
60+
High School & Middle School Divisions
We have added a new age division based on parent feedback.
Middle Schools Athletes (male and female ages 11-14
High School Athletes 15 - 18
We’re excited to bring these back after a huge success in 2025!
Parents & Coaches: Want to race alongside your young athlete? You can jump into the High School/Middle School wave for free! Just email us after your athlete registers, and we’ll send you a free entry code.
Volunteers Needed – Earn Discounted Race Entry OR FREE Camping!
Volunteer Sign UP: https://www.signupgenius.com/go/8050B4CAEAB2AA1F58-61885436-alma#/
2025 RESULTS: Race Results - Race in the Clouds - ITS YOUR RACE
See you in the clouds!
6.1 Miles 6.2 Miles 13 Miles 13.1 Miles 22 Miles 26 Miles 38 Miles Duathlon Mountain Biking Run Trail
Thu, Jun 25, 2026 at 4:30 PM
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.
We are back at CU Pott’s Field on a
brand new track!! This summer we are hosting four total events in June, July and August at CU Potts Field, Boulder. And this means we can run our full schedule of track events (including the Steeplechase on July 18), jumps, and throws!!
BRR Members Save $5 off adult pricing!
Use the email address associated with your membership. Non-Members can easily join in the registration process to immediately save.
3k Run
Sat, Jun 27, 2026 at 4:00 PM
52.6 km from TabernashUltra
Sat, Jun 27, 2026
77.9 km from TabernashHalf Marathon Run Walk
Sat, Jun 27, 2026 at 8:00 AM
89 km from TabernashCriterium Cycling
Sat, Jun 27, 2026
91 km from Tabernash50k Relay Ultra
Sat, Jun 27, 2026 at 12:01 AM
$55.55 New Year’s Eve Pricing
The gnome picked the number.
New beginnings, big changes, zero regrets.
Hey Beautiful Slackers!
The 2026 Slacker Races will be held on June 27 Start Time 7:30am
There
will be NO RACE DAY REGISTRATION
Get ready for an epic adventure at the 2026 Slacker Races!
Seize the chance to earn your bragging rights as a true Slacker! Embark on this exhilarating journey starting at the base of Loveland Ski Area, perched at an impressive elevation of 10,630ft. Brace yourself for an unforgettable descent to 8,400ft, followed by post-race festivities in charming historic Georgetown. Picture an abundance of freebies, locally crafted beer, post race pampering, and entertainment to celebrate your achievement!
The course is a thrilling mix of dirt and paved roads, guiding participants through enchanting wetlands, natural waterfalls, breathtaking views of the Continental Divide, and remnants of historic mining sites.
RACE LOCATION - CITY PARK / FOSTERS PLACE
FULL DETAILS CAN BE FOUND ON OUR WEBSITE AT https://www.slackerhalfmarathon.com/
See you June 27, 2026 Slackers!
4 Miles 13.1 Miles Half Marathon Relay Run
Sat, Jun 27, 2026 at 7:00 AM
Loveland Lake to Lake Triathlon has welcomed athletes from Northern Colorado, this entire state, region, country, and outside the USA for 24 years and we are excited about our 2025 edition.
Athletes
have ONE OPPORTUNITY each summer to compete at this beautiful venue. Loveland CO~ one opportunity, one time each summer on a Saturday morning in June.
Lake to Lake Events is proudly known for striking the perfect balance between providing a very beginner-friendly experience where athletes who are new to the sport can ask the questions they need to feel comfortable and have a successful day (everyone from our staff to volunteers, our sponsors, and other athletes are willing to help) and at the same time attracting a high level of talent from outside the state as well as athletes from CU and CSU.
Racing for YOUR reason ~ whether you’re seeking an introduction to multi-sport, improvement upon your performance from the year past, competing for a slot at USAT Nationals (this is a USAT-sanctioned event), or coming out and competing with family and friends, we welcome all athletes to compete and improve at your level. An event known for its friendly local atmosphere, lovely venue, tremendous volunteer force, and a great race course.
No matter the athlete’s background, everyone will be able to relish in our friendly local atmosphere, incredible volunteer support, a scenic course, and a shady venue that makes spectating enjoyable for the whole family (even a playground for the kids!). Plus, you won’t find a better post-race meal anywhere else.
Triathlon
Sat, Jun 27, 2026 at 7:30 AM
The Denver Pride 5K is more than just a race—it's a powerful way for supporters of The Center on Colfax to make a difference in the lives of Colorado’s LGBTQ+ community. This event serves as a
crucial fundraiser, enabling us to provide free essential services, programs, and activities to LGBTQ+ individuals and our allies year-round.
Thanks to the incredible efforts of those who joined us in 2025, we raised over $240,000 to continue advancing our mission. Every dollar raised helps us strengthen and support our community, and we are deeply grateful for your dedication. We can't wait for you to run, walk, roll, or sashay with us in 2026!
3.1 Miles 5k Run Walk
Sat, Jun 27, 2026 at 8:00 AM
Come join the Before The Fourth 5k for some healthy fun in Clement Park on June 27th. The park is located just south of Denver, in Littleton, Colorado. This is a great opportunity to build community
and run in a great location with plenty of local spots to hang out with friends and family afterward.
Event Name: Before The Fourth 5k
Event Location: Clement Park, 7306 W Bowles Ave, Littleton, CO 80123, (J,K,L Shelter)
Event Date: June 27th, 2026
Start Time: 8:00 am
Day Before Packet Pickup: June 26th, 5:30 PM-7:00 PM, Starbucks - 6149 S Balsam Way, Littleton, CO 80123
Morning Of Packet Pickup: Starts at 7:00 AM on race morning, June 27th, at shelters (J, K, L).
3.1 Miles 5k Run
Sat, Jun 27, 2026 at 5:00 PM
Join us for the 29th running of the Downtown Boulder Pearl Street Mile on Saturday June 27th, all taking place on the Pearl Street Mall.
It is a massive night of 1-Mile races on our criterium
multi-lapped course, that starts on Spruce St and 14th St. It completes 3.75 laps around the famous Boulder Court House and up the Pearl Street Mall. Famous Landmarks you will run past:
Boulderado Hotel - 1909
Boulder Theater - 1906
Boulder Court House - 1933
Pearl Street Mall - 1977
Races on offer:
5:00PM - Kids 800m
5:20PM - Family and Friends 1-Mile
5:40PM - 10min or slower
5:55PM - 9:00 - 9:59
6:10PM - 8:00 - 8:59
6:25PM - 7:00 - 7:59
6:40PM - 6:00 - 6:59
6:55PM - 5:00 - 5:59
7:10PM - High School Girls
7:25PM - High School Boys
7:35PM - Elite Masters Men and Women
7:50PM - Elite Women
8:00PM - Elite Men
With over 2000 spectators lining the course, and screaming their lungs out, what better way to spend your Saturday evening, than racing around Boulder's iconic land marks, and partying on the Pearl Street Mall with high energy racing and a pumping DJ!
Our FREE T-Shirt offer ends Sunday, May 17th at 11:59PM.
Baby strollers ARE allowed.
NO Dogs are permitted in the race.
There are NO race refunds.
1 Miles Run
Sun, Jun 28, 2026
90.2 km from Tabernash24.78k 42.49k Marathon Run
Sun, Jun 28, 2026 at 5:30 AM
Although the air will be noticeably thin at the starting line, Echo Lake's 10,600 feet of elevation is just the beginning. The climb totals nearly 4,000 vertical feet - much of it above treeline - as
you make your way 14.5 miles to the finish line located at the summit of one of the most recognizable peaks on Denver's mountain skyline - 14,264 foot Mt. Blue Sky (formerly Mt. Evans). Learn about the name change by clicking here..
Be inspired!!!
Join us on June 28, 2026 for another memorable run.
Spectators will include Bighorn Sheep, Marmots, and Mountain Goats - maybe even a few people!!!
There are two options in 2026: The Ascent is a one-way 14.5 mile climb from Echo Lake the summit of Mt. Blue Sky. the Round Trip is just as it sounds -- you will run to the top, then run back down.
14.5 Miles 29 Miles Run
Sat, Jul 04, 2026
58.9 km from TabernashRun Trail
Sat, Jul 04, 2026 at 8:30 AM
89.8 km from Tabernash5k
Sat, Jul 04, 2026 at 7:30 AM
Dress up as your favorite American Hero! This could be your mom, dad, Albert Einstein, Batman, Superman, or the Powerpuff girls! This event is all about celebrating GREAT people who do and have done GREAT things! Come be GREAT with us!
Sign up for a team and each member saves $5! (Registrations for the kids race do not count toward the team discount) See our FAQ page for how team pricing works!
5k 10k Run