Event details subject to change. Please confirm all information via event website.
Grace Race 5K
Help eRace World Hunger at Rainbow Trail Lutheran Camp’s Annual Grace Race! This annual 5k run/walk was started as part of RTLC’s 50th anniversary in 2007, to raise money for ELCA World Hunger. The event is held in collaboration with the Rocky Mountain Synod Hunger Network. Over the last 15 years, RTLC and the participants […]
Hot Chocolate 15K/10K/5K
Start and finish at Civic Center Park amongst Denver's biggest chocolate aficionados. All participants receive a technical running quarter zip with registration. Runners can also enjoy hot chocolate, chocolate fondue, and dipping snacks at the post-race party! It’s not just a race, it’s an experience. Register today!
Windsor Marathon
Welcome to the annual Windsor CO Race! This year's event will start and end at The Island at Pelican Lakes in Water Valley, with a great after party including beer, music and live entertainment! New to the series is a Full Marathon distance, as well as the Half Marathon and Heavy 10K.
Run Crazy Horse Marathon
The Run Crazy Horse Marathon events begin in the shadow of the world's largest mountain carving, Crazy Horse Memorial, and finishes in the heart of the Black Hills... Hill City, South Dakota
OTILLO Swimrun
Welcome to the world of ÖTILLÖ Swimrun! ÖTILLÖ Swimrun, the original swimrun race, embodies the spirit of adventure, endurance, and teamwork. Originating in Sweden, ÖTILLÖ translates to “island to island” in Swedish, reflecting the essence of the sport where participants traverse across a series of islands by swimming and running, often in challenging and picturesque […]
Tortoise & Hare 4K
Rolland Moore Park 2201 S Shields St, Fort Collins, CO, United StatesThe Tortoise & Hare (T&H) is a low-key “handicap” series of seven races that are run monthly from October to April, typically on the first or second Sunday of the month. Computer-predicted times allow runners of all levels to compete equally. Runners start at staggered intervals with faster runners (Hares) trying to catch slower runners […]
Michael J. Fox Foundation’s Run/Walk
We're excited to invite you to be a part of The Michael J. Fox Foundation’s Denver Run/Walk, a community event dedicated to raising awareness and funds for Parkinson's research. Lace up your sneakers and join us as we come together to make a difference in the lives of those living with Parkinson's disease. Event Highlights: […]
Rubey Rescue Run
Join us for a 5K uphill race on Buttermilk Mountain—with your furry friends, or without! Starting at the base near Buttermilk Mountain Lodge (formally known as Bumps) and climbing 1,700 feet to the Cliff House, this timed race ends with stunning views of the Maroon Bells. Prizes for top 3 female and male finishers. Also […]
Strides for Sierra 5K
Get your sweat on running or enjoy a leisurely stroll through the beautiful neighborhood surrounding Sierra Elementary! Starting at 10:00am the little ones can participate in a 1K fun run around the Sierra track. Afterwards stay and enjoy the Race Village with vendors, food, drinks and activities for the kids all while supporting the Sierra […]
Splashland Triathlon
Catch a glimpse of the Great Sand Dunes National Park with six 14’nrs in the background Mt. Blanca, Colorado’s 3rd highest peak overlooks the valley floor.
Liberty Energy 5K
Please join Liberty for our 5K run and walk, benefitting the Bettering Human Lives Foundation. This family-friendly event will include live music, a beer garden, face painting, food trucks, and more! Every dollar we raise will support the foundation's mission of expanding access to clean-burning cooking fuels in sub-Saharan Africa by funding African innovators and […]
Fall Foliage Fun Run
The best time of the year to be in Colorado! Aspen trees, perfect weather, less crowds. You don't want to miss this experience!
Long View Marathon
Showcasing a unique city-to-city trail connection, The Long View Marathon and Half Marathon runs from Fort Collins to Loveland. Together, Gnar Runners and Sweetheart City Racing bring a unique collaboration to Colorado’s running scene in this one-of-a-kind race event.
Suffer Better 50K/25K Trail Run
We are stoked to once again invite you all to come run with us at Staunton State Park, off of Highway 285 near Conifer, CO, on October 15, 2022. We are even more stoked to be able to add to our existing 25 and 50K event offerings, this year adding a special 25K Fishslappers edition […]
ASDAsh 5K to Beat Tooth Decay
Join us for the University of Colorado School of Dental Medicine's Annual ASDAsh 5K to Beat Tooth Decay! This year, we will be starting and ending at Boettchers Commons! Additionally, we're including the Meatball Mile, featured on the course. This section will be a designated Strava Segment, and there will be a prize for the […]
Breckenridge Road Marathon
Join us for an unforgettable two-day running experience in the heart of Breckenridge! Our RunFest Weekend kicks off Saturday with a 5K, 10K, along Main Street, followed by the Half Marathon and Full Marathon on Sunday, starting at 10,434 ft on Boreas Pass Road. Make a weekend of it, race, recover, and explore everything Breckenridge […]
CMRA Stone House Triple-Cross
The race will begin just west of Estes St across from the Stone House Park on Bear Creek in Lakewood. It will head west mostly on dirt trails through the creek side trees with a short piece on the Bear Creek bike path. Near the Fox Hollow golf course the route crosses Bear Creek 3 […]
Colorado Believe 5K
Know that you're part of something bigger. By raising awareness, we can help other families who may still be searching for answers. Any funds raised will go to Dup15q Alliance who provides family support and promotes awareness, research, and targeted treatments for Dup15q syndrome.
Lions Roar for Fitness 5K/2.5K
So What Is the Lions Roar for Fitness 5k/2.5K Challenge? 5K Challenge — Starts promptly at 9:00 a.m. at Lake Minnequa (near CIMS), but please arrive by 8:15 a.m. There will be a shot gun start. Medals will be awarded to all age group winners after the race. 2.5K Challenge – Starts promptly at 9:10 a.m. at […]
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 […]
Kipling Villas 5K
This race will be throughout the trails in the Kipling Villas neighborhood near Lilley Gulch Recreation Center.
Faith & Blue 5K
Join us for the 2026 Faith & Blue 5K as we bring together law enforcement, local faith communities, families, and neighbors for a morning of fellowship, unity, and community connection. Faith & Blue is about building bridges between law enforcement and the community through shared experiences and meaningful relationships. The 5K is more than a […]
Footsteps for Families 5K
Join us for a heartwarming and inspiring race event that celebrates the power of community and compassion! Safe Families for Children is a remarkable Global Movement dedicated to keeping children safe and families together. Picture this: a vibrant atmosphere filled with families, friends, and runners of all ages, united by a common goal – to […]
Rocky’s Backyard Ultra
Rocky's Backyard Ultra is a challenging Ultra Trail race hosted in beautiful Estes Park, Colorado. We strive to host a challenging event that is welcoming and motivating to all. "One More Lap" The Backyard Ultra is a form of Ultra Trail race where runners must complete 4.167 miles in less than one hour, every hour, until only one […]
Westy Half and 5K
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. This is one of the few 5k events where FINISHER MEDALS are awarded to each participant.
Breakthrough T1D Walk
As the leading global type 1 diabetes (T1D) research and advocacy organization, Breakthrough T1D has played a crucial role in nearly every major T1D breakthrough in history. No organization does more to improve everyday life with T1D—from therapy development and access, to expanding research, advocacy, and community support. Breakthrough T1D Walk is the world’s largest […]
Run the Rocks
Celebrating our 21st year, the American Lung Association in Colorado proudly offers the only timed-race event at the iconic, gorgeous Red Rocks Park & Amphitheatre. This unique run/walk challenge combines breathtaking scenery and a rock ‘n roll vibe for our 1.3-mile run/walk and 5K. Dogs are welcome at both events. We will host over 1,500 […]
EDT XC Showdown
Whether you run for a team, as an individual, or you just want to try out the experience of running a cross country race, you are welcome to join us for the 2024 Elevated XC Showdown! Boys/Girls will run in combined races, and will be separated by age groups below. All courses utilize the same […]
Indian Creek Fifties
The Indian Creek Fifties takes advantage of the challenging and little used terrain just southwest of the Denver Metro area. Loop 1 climbs to 8000′, and quickly flows down into the Grand Valley for a few gorgeous pink sunrise soaked miles. This loop almost seems friendly, until you’re given a few sharp stabs in the […]
Bobcat Trail Races
Bobcat Trail Race was created to feature one of Colorado Spring’s best city parks, Palmer Park. Runners will enjoy views of the city and Pikes Peak from the rocky bluffs. Come out and enjoy this amazing trail system, right in the heart of the city! Formerly a Mad Moose Event & graciously passed on to […]
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