Yeti Chase 5K & 10K
2025-01-26, 2026-01-25 | Bear Creek Lake Park (Lakewood), 15600 W. Morrison Road, Lakewood, CO, 80228, United States
The Yeti Chase 5K & 10K take place at beautiful Bear Creek Lake Park in Lakewood. This is the 13th year for the Yeti Chase, and it has sold out well before race day in all previous years.
After chasing down the Yeti, runners wander the park’s 2,500 acres, known for it’s diverse bird and waterfowl population as well as stunning views of the foothills. Quality Long Sleeve gender-specific technical running shirts, hot cocoa, and a personal video of your race finish!
Get your photo taken with the Summit Cove Yeti and you could win a free summer stay at one of the beautiful Summit Cove properties in Keystone!

Ralston Creek Half-Marathon & 5K
2025-02-16, 2026-02-15 | Arvada, Arvada, CO, United States
The Ralston Creek Half-Marathon & 5K has become Colorado’s premier winter half marathon!
Finisher Medals for Half Marathon finishers and a generous 4:30 cutoff time.
Courses follow a scenic mix of road and bike path through Arvada’s beautiful west side. Long-Sleeve Gender-Specific Tech Shirts, hot cocoa, breakfast burritos from El Senor Sol Mexican restaurant, and free race photos.

Boulder Rez Half
2026-04-11 | Boulder Reservoir, 5275 Reservoir Road, Boulder, CO, 80301, United States
This spring race features a spectator-friendly Half Marathon, 10K and 5K course. Attracting athletes from all over the west due to its phenomenal scenery, glamorous finisher medals, perfect running temperatures with many nearby Boulder attractions to enjoy after the race.
The run course loops around the Boulder Reservoir and remains mostly on dirt trails. The course is flat with only 200 feet of elevation gain. You will experience iconic views of the mountain range to the west.
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The Half Marathon will complete 2 loops, and the 10K will complete one loop. 5K runners will take a different course route.
The Half Marathon is now a USAT Certified Course.

Timberview Trail Run
2026-06-27 | Boyd Lake State Park (Loveland), 3720 N County Road 11-C, Loveland, CO, 80538, United States
Crisp morning air and a summer sunrise in Colorado. YES PLEASE! Join us on the foothills at Lory State Park for a fun & beautiful morning trail race experience.
This run race features three distances (a 10 mile, a 5 mile and a 5K) that are great for just about any level athlete at any age. Run on a beautiful & scenic course among the treetops with views of Horsetooth reservoir, Fort Collins & the foothills. Bring the kiddos too as the 5K route is very beginner friendly.

Donor Dash 5K
2026-07-19 | Washington Park, Denver, S. Downing St. and E. Louisiana Ave., Denver, CO, 80210, United States

Narrowleaf Lake Run
2026-10-31 | Boyd Lake State Park (Loveland), 3720 N County Road 11-C, Loveland, CO, 80538, United States
Brisk autumn running in Colorado – OH YEA! Join us for a family fun event with FIVE distance options at the beautiful Boyd Lake State Park venue.
Choose your adventure! Heavy 5K, 10K, 15K (4, 7 or 10 mile) or 1 Mile Pumpkin race options. There is also a Kid’s Fun Run (1 & 1/2 mile options) as well!
This course is on perfectly paved walkways with about a half mile being off road on the south loop. Beautiful lake and wildlife views, NO vehicle traffic to worry about and fun post race festivities. Did we mention almost no elevation gain? This is one flat course making sure you’ll set a new PR or enjoy a fun steady-paced morning run race.
What’s a “Narrowleaf”?? The Narrowleaf Cottonwood Trees are the most densely populated tree species at Boyd Lake State park. We thought the name was fitting and unique to this venue.
