Event details subject to change. Please confirm all information via event website.
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.
Jungle Dash
Come join us for a 1-mile fun run, as we kick off the Wild Wonderful Saturday events. Plan to stay and check out the Wild Zone. Welcome adventurers, explorers, and vine-swinging daredevils! You are invited to join us for a ROARING good time! This is going to be the WILDEST Jungle Dash of the year! […]
Oktoberfest 5K Trail Run
The Oktoberfest 5K returns this fall on Saturday, September 13th, offering an active start to a festive weekend. Lace up your running shoes and experience the changing aspens and beautiful scenery in this 5K trail run on Town of Breckenridge Trails, finishing right in Blue River Plaza on Main Street in time to enjoy the […]
Canceled Sloan’s Lake Search Party Marathon
THE SUMMARY Did you know that the loop around Sloan's Lake in Denver Colorado is almost perfectly 2.62 miles around? Join us as we go around the lake every hour on the hour for 10 hours to complete a full Marathon or every other hour for 10 hours to complete a Half Marathon (if you decide to […]
Mighty Marmot Kids Trail Race #2
Come join the Vail Recreation District for the 3rd Annual Mighty Marmot Kids Trail Race Series! Youths ages 4 to 10 are welcome to participate. Chose between 1 or 2 miles* to compete amongst your friends and celebrate with awards and ice cream after you finish! *4-year-olds can only race in the 1 mile category This series includes […]
D49 4.9K
Join us for the D4.9k Run/Walk, a family-friendly event open to D49 staff, students, parents, and community members! Our mission is to offer an engaging, affordable, and healthy event for everyone in our community. The event kicks off at 8:30am, with the D4.9K Run/Walk starting at 9am. Bring your little ones for the free 49-yard […]
St. Jude Walk/Run
Event Description: St. Jude Walk/Run is a family friendly 5K event, taking place at Dick’s Sporting Goods Park on September 23rd. Participants come together during Childhood Cancer Awareness Month to help support the lifesaving mission of St. Jude: Finding cures. Saving children®. Other details: Registration is free and participants are encouraged to share their fundraising page […]
Move Forward 5K/10K
The Move Forward 5K/10K is an event created by the Doctor of Physical Therapy students at Regis University as a community outreach project. The proceeds from the event will benefit Canine Companions for Independence and the Foundation for Physical Therapy.
Rock Cut Estes Park 5K
Join us for The Rock Cut Estes Park 5k on September 20, 2025, for a 5k-ish, fun run event that starts and ends at this awesome taproom in Estes Park. Run, walk, jog - whatever goes! Complete the course and celebrate with us and a FREE, local craft brew at the finish line. Start windows […]
Be Ovary Aware 5K
Raise awareness for ovarian cancer and raise funds to support Coloradans with 7 different types of gynecologic cancers: Ovarian, fallopian tube, uterine/endometrial, cervical, vaginal, vulvar and peritoneal cancers. This event benefits Sue Gift - Gynecologic Cancer Support.
Golden Leaf Half Marathon
13.1 mile trail race with nearly 1000 ft of elevation gain from Snowmass to Aspen
Mountain Chile Cha Cha Trail Races
The Mountain Chile Cha Cha Trail Race offers a 5K and 10k race. The races begin just outside downtown Pagosa Springs, CO, on Reservoir River Ranch, where you'll run on jeep and ATV trails and enjoy breathtaking views of the San Juan Mountains. The course offers varied terrains - fast flats, moderate slow hill climbs, […]
Estes Epic
Join us for the Estes Epic — a premier event featuring a 50k Bike Race, 50k Run, and Heavy Half Marathon. After a six-year hiatus, this challenging race returns, offering participants rugged trails, significant climbs, and breathtaking views of Rocky Mountain National Park. Event Details: 50k Bike Race (Saturday) Tackle 50 kilometers of demanding terrain, […]
Colorado Brain Tumor 5K
The Colorado brain tumor community will come together for a 5K Walk/Run to raise awareness and funds to support the needs of patients with brain tumors and their families.
Canceled Rising Phoenix 5K
The Rising Phoenix Festival & 5K Run/Walk for Suicide Prevention is Combat Recovery Foundation's first community awareness event. Runners, walkers, dogs and participants of all ages, volunteers, and spectators will gather together in celebration of life. The 5K provides an important sense of community for suicide loss and trauma survivors and creates a space for […]
CDDR 5K Run to Rescue
The Colorado Domestic Duck Rescue 5k Run to Rescue is a untimed fun run or walk to support the rescue and homing of domestic ducks dumped by their owners into environments where they will not survive. The run, to be held Sept. 28, 2025 at 9 a.m., supports education efforts to build awareness concerning proper […]
Palmer Lake .5K (Yes “Point” 5)
The Fastest Growing (and shortest) Running Event in CO is back!!! Awake the Lake will hold its 8th Annual PALMER LAKE .5K (Yes “Point” 5), and it just keeps getting better. The “run for everyone” is a challenging entire ½ kilometer, where competitors are rewarded not only with the unique views of beautiful Palmer Lake, […]
AAP Friends of Children Fund 5K
Start your day with fresh air, movement, and unbeatable views at the AAP Friends of Children Fund 5K Fun Run & Walk! Set against the stunning backdrop of Sloan’s Lake Park, participants will enjoy a scenic route featuring sparkling lake views, majestic mountain peaks, and the city skyline in one picturesque loop. Whether you’re running […]
Mighty Marmot Kids Trail Race #3
Come join the Vail Recreation District for the 3rd Annual Mighty Marmot Kids Trail Race Series! Youths ages 4 to 10 are welcome to participate. Chose between 1 or 2 miles* to compete amongst your friends and celebrate with awards and ice cream after you finish! *4-year-olds can only race in the 1 mile category This series includes […]
Flyin’ Ryan Memorial 5K
Join us for the inaugural Flyin' Ryan Memorial 5k , a heartfelt event dedicated to honoring the memory of Ryan Vomacka, an exceptional athlete and individual who left an indelible mark on our community. Ryan, a Mountain View High School graduate, was an integral part of the Cross Country and Track teams, helping lead the […]
Not So Flatt Breast Cancer Awareness Run
Join us for the Not So Flatt Breast Cancer Awareness Walk and Run. In 2021, my father lost his fight against breast cancer so we have put together an annual race in his name to support everyone who has fought and is still fighting breast cancer. His last name was Flatt and his battle wasn't […]
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 […]
Big Waves 5K
Hi Friends of Big Waves! We are looking forward to having everyone back for our family 5k this year! We are going to do a superhero theme, so come dressed as your favorite good-doer! We will be back at Lifetime Fitness in Westminster (off 144th an I-25). Please reach out if you have any questions […]
Cart to Cart Trail Run
10 or 19 mile trail runs at the height of fall colors in Crested Butte. Fun prizes to winners and random participants. https://www.cbmountainrunners.org
Mines Homecoming 5K
Miner Gold Rush 5K
Prospect Ridge Academy is thrilled to present our Annual Miner Gold Rush and Fall Festival! All proceeds will benefit Prospect Ridge Academy, a public charter school providing a rigorous, quality K-12 education with an intensified math and science focus. Help support the school while having fun in this exciting community event!
Paws In The Park 5K
Celebrate a summer of fund-racing with us at Paws In The Park 5k Race and Pet Walk! Enjoy live music, breakfast, and mimosas. See you there!
Mustang Music 5K
5K DETAILS: The 5K features a chip-timed race designed to show the beauty of the neighborhoods by Kinard Middle School. Enjoy the music along the course provided by the Kinard and Fossil Ridge bands. REVERSE PARADE/FUN RUN DETAILS: Perfect for young children and non-runners, the Reverse Parade is a Fun Run in which participants will […]
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 […]
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 […]
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