Event details subject to change. Please confirm all information via event website.
Summit Trail Running Series I
Summit County Allocation Park 639 Landfill Road, Dillon, CO, United StatesExplore the trails of Breckenridge this summer with the 23rd annual Summit Trail Running Series with each race followed by a post-race party! The Series consists of 5 trail races in and around Summit County, May-July. Each race features a short and long course, and all races are open to runners of all abilities ages […]
The Big Run 5K
Celebrate what makes running fun — high-fives, endorphins, good friends. Come hang with Fleet Feet on Global Running Day, run a breezy 3.1 miles and make The Big Run an epic party.
First Fridays 5K
Festival Park 199 Perry St., Castle Rock, CO, United StatesFriday nights in the summer are made for spending time close to home, enjoying the beautiful weather, and unwinding from the long week. Why go anywhere else but Downtown Castle Rock? Start the night off on the right foot with the First Fridays 5K. Before enjoying the free concert event, get a workout with the […]
Summits Trail Runs
The Summits Trail Runs occur at Granby Ranch Resort in Colorado’s beautiful Rocky Mountains. These challenging trail races offer a variety of distances ranging from shorter runs to ultra distances, each course showcasing sweeping mountain vistas, dense forests, and rugged alpine terrain. Runners experience varying elevation gains that test endurance as the routes twist through […]
Great Divide Ultra
Experience the spring-fed meadows, massive rocks of Pikes Peak granite, and sweeping views of Colorado’s most spectacular mountains in the Great Divide Ultras. This Colorado early season 100m, 100k, 50k and 25k trail ultra takes place entirely on the beautiful rolling meadows of Mueller State Park. The beautiful looped course is 100% smooth single/double-track trail. […]
Basalt Half Marathon
The Basalt Half Marathon is a fast gradual downhill race on a scenic 2 lane road along the Frying pan river. This race is a fundraiser for the Basalt High school cross country team and has been going since 1976. Runners will be bused to the start line and run to the finish line at […]
Colorado Triathlon
The Colorado Triathlon is where Colorado comes to race! The Colorado Triathlon - sprint & olympic distances, duathlon & aquabike options . To make this the "can't miss" event of the season, we'll also have athlete hoodie sweat shirts, and the best swag bag of the season. For us this race is about one person, […]
Steamworks Half Marathon
The Steamworks Half Marathon will take place in the San Juan Mountains . This high-elevation, 13.1 mile race will take place at 6,500 feet above sea level. The course is a point-to-point route. Runners will race down county road 250, alongside the Animas River. The race will finish at the Durango Sports Club on Florida […]
J-Town Jog 5K
Get ready to rumble at the J-Town Jog 5K and Mile, an annual family-friendly event to kick off Johnstown Barbeque Day! Runners and walkers of all ages and abilities will enjoy the 5K and 1 Mile routes now located at Johnstown Reservoir, offering a fun, scenic, and relaxing venue for participants. While the course has moved from […]
Step Up For Women And Recovery 5K
This event brings together the community and supports scholarships for women who seek treatment for drug and alcohol addiction. People entering a program often have the commitment to complete treatment but insurance coverage ends before their planned discharge. These scholarships help to fill that gap. As a nonprofit with over 50-years of serving clients, our […]
PPRR Nielson Challenge
North Monument Valley Park 1794 Culebra Ave., Colorado Springs, CO, United StatesRace Format The first time you run this event, you'll establish a base time for yourself. This base time is used to generate a handicap time. The handicap time is calculated using an algorithm developed by Bob Royse, and it's geared to favor a beginning runner and the slower runners. Click here for an explanation of the […]
Haul Ass Ultra Running Festival
Come out and enjoy a unique running experience at the beautiful Luvin Arms Animal Sanctuary with live music, food, and fun! Flat & fast off-road cross country style course with a beautiful view of the stunning Rocky Mountains and all of the beautiful animals living at Luvin Arms! Eight event options! 5k, 10k, 50k, 50mi, […]
Mace’s Hideout 100
Mace’s Hideout 100 is as beautiful as it is tough. ONLY 75 spots open for each distance!!! The Wet Mountains of Colorado are a hidden gem set amongst giants. One of the older ranges in Colorado, the Wet Mountains are a sub-range of the more sought after Sangre de Cristo Mountains. Yet within this small […]
5K In My Shoes
The 5K In My Shoes event will return to Envision (1050 37th Street Evans, CO 80620). Check-in/registration starts at 7:30 AM and the race begins at 8:30 AM. The start and finish line will be at Envision’s office and participants can walk/run/roll on the course through the streets in the neighborhood with a 1K and […]
Centennial Airport Runway 5K
Planning for the 2026 Centennial Airport Runway 5K is officially underway – and while we’re still finalizing many of the details, one thing is certain: race day will be packed with unique experiences you won’t find anywhere else. Check back often as we add attractions leading up to June 6, 2026. The Centennial Airport Runway 5K […]
Valley Bottom Rio Trio
Alamosa Parks and Recreation and Adams State Adventure Programs are partnering to bring the San Luis Valley the first annual “Valley Bottom Rio Trio”; an adventure-style triathlon race within the City of Alamosa on June 12th. This fully chip-timed race will feature an 8-mile trail bike ride, a 3-mile paddle on the Rio Grande, and a 5k run.
Aiden’s Adventure 5K
Let's help Aiden give back to his community and honor him in such a loving way. Aiden's Adventure 5k is designed to remember Aiden, a sweet, caring, "never met a stranger" personality, forever 5-year-old that is so dearly missed by his friends and family. Aiden was lost in a tragic accident, but we keep his […]
Creede Donkey Dash
IMPORTANT: Please do not register for this race until you have been matched with a donkey teammate! Race registration is separate from a donkey rental. Donkeys first arrived on US soil in 1784 as a royal gift from King Charles III of Spain to George Washington. The donkeys first worked the plantations, but by the […]
Mickelson Fast 5K
Part of the Deadwood Mickelson Trail Marathon event.
Colorado 13er
The Colorado 13er is THE event where the best parts of trail running and road racing combine to create a truly enjoyable, kind-to-your-body, well-supported 13.1 race! Seasoned runners and first-timers alike appreciate the excellent communication from the 13er race crew who make this event accessible for athletes of all levels.
Crazy Legs 10K
-The race begins at 7:00am and held at Devil’s Backbone Open Space 1725 Hidden Valley Drive in Loveland. Trail conditions can be access through the website https://www.larimer.org/naturalresources/parks/devils-backbone -If the trails are closed due to muddy conditions all runners will be transferred to the next year as I am unable to reschedule due to not living […]
Steamboat Marathon
Run alongside the roaring Elk River through the emerald green pastures on Country Road 129 with the snow-capped Rocky Mountains of Colorado all around and find out why the Steamboat Marathon was ranked as one of the “Top 10 Destination Marathons in North America.” Marathon, Half-Marathon, and 10K
RMRR Bible Park 4K
Bible Park 6802 E Yale Ave, Denver, CO, United StatesEveryone – slow, fast, or in-between – can win at RMRR Trophy Series races. With our handicap scoring system, we predict YOUR finish time based on recent running results, giving you a great goal to shoot for whatever your speed. Just show up an hour before the start and we’ll get you ready for your race. It’s an […]
Flamingo Day 5K
Join us for a fun and festive day at Denver's Sloan's Lake Park.
Adidas Terrex 10K Spring Runoff
Vail Village 292 E Meadow Dr, Vail, CO, United StatesChallenge the Vail Valley’s best trail runners along with top professionals at almost 9,000 feet as you compete for a cash purse. This course will truly test your fitness with its constant elevation changes and mountainous terrain. Start training now for one of the most challenging 10Ks in the nation!
Deadwood Mickelson Trail Marathon
26.2 Miles of Black Hills, South Dakota Beauty!
Adidas Terrex 20K Trail Run
Vail Village 292 E Meadow Dr, Vail, CO, United StatesCOURSE CHANGE FOR 2026 & BIGGER PRIZE PURSE! A behemoth of running races, the adidas TERREX 20K Trail Run is for the boldest competitors. Destroy a near-half marathon on a difficult course that spans nearly the entire front side of Vail Mountain! One of the more challenging and rewarding 20Ks in the nation, line up alongside some of the Vail […]
DU Dash 5K/10K
Experience the awe-inspiring beauty of Colorado's Palmer Lake area on the Santa Fe Trail for the in-person DU Dash. Runners will traverse the trail framed by the Rocky Mountains, connecting with nature while supporting wetland conservation efforts. Join us for a memorable journey through stunning vistas and pristine wilderness, where every step taken contributes to […]
Adidas Terrex Sunday Funday 5K
Vail Village 292 E Meadow Dr, Vail, CO, United StatesNEW COURSE FOR 2026! Kick off your Sunday the fun way with fresh air, fast feet, and a 5K full of good energy. The Sunday Funday 5K is just what you need to kick off your day! Good vibes, great people, and 3.1 miles of fun! It’s the adidas TERREX Sunday Funday 5k at the GoPro Mountain Games!
Walk to Cure Arthritis
Together, let’s walk to a lifetime of Yes! Yes, to finding solutions, better treatments and a cure. Whether you have arthritis yourself or care about someone who does, sign up and raise funds for WALK to CURE Arthritis!
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