50K

It has been described as Urban Legend. More mysterious and barking spiders than the Barkley Marathons. The International Taco Bell 50k boasts a higher DNF rate than the famed Leadville […]

Announcement: All Course Profiles and GPX files are released on the race website! Come join us to run through a magical part of history in the Cuchara Valley. The Spanish […]

What A free mountaineering jaunt originated by James Varner in honor of the legendary John Cappis, one of the founders of the Hardrock 100. The course gets tweaked from year […]

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 […]

Samson was the celebrity elk of the Rockies until he was illegally poached in 1995 on YMCA grounds. Our race runs on Samson’s home turf, The YMCA of the Rockies, […]

Join us for the Denver Beer Co. 50k run on Saturday, May 3, 2025. This unique urban odyssey 50k run connects all 5 Denver Beer Co. Taprooms (Olde Towne Arvada […]

We are pleased to present one of the most beautiful and challenging trail racing events in the state of Colorado with breathtaking (literally and figuratively) views of Clear Creek County […]

Colorado Cold Rush Ultra is the “coolest” winter running event! Run along historic High Drive and through the amazing tunnels of the Colorado gold rush. Although there is always a possibility […]

Held on the gorgeous, thrilling and rolling trails of Castle Rock’s Miller Park & Ridgeline Trail systems. While not overly technical, these trails will challenge and excite, as you soak […]

Distances: 50k (9 hour cutoff) and 16 mile (7 hour cutoff) and 5 mile (New!)