Half Marathon

13.1 mile trail race with nearly 1000 ft of elevation gain from Snowmass to Aspen

The Vail Recreation District is excited to announce a NEW venue for one of our favorite events in the 2021 Dynafit Vail Trail Running Series - The Dynafit Half Marathon and 5K at Arrowhead in Beaver Creek on August 21st.

The tragic events of 9/11/01 changed our nation forever. Let us not forget our proud history and those who fight everyday to keep us free. Please join us for this […]

Walk, run or ruck, a 5k, 10k, Half Marathon or 12 Hour Last Man Standing Race to celebrate the Red, White and Brew in Windsor, CO! Starting and ending at […]

Join Run to Change Lives at the Douglas County Event Center in Castle Rock for the 2nd Annual ROCK-IT RUN 5K, Half Marathon and 1K Little Rock-It RUN (8 years and under). It’s time to start a new tradition on July 4th and feel good about Changing Lives. Save 15% with coupon code CORUNNER.

Welcome to the Staunton Rocks! Marathon & Half Marathon, an event put on by trail runners for trail runners on August 28, 2021. Touring the renowned singletrack of Staunton State Park in Colorado’s Front Range Mountains southwest of Denver, the race will take you back in time as you glide by historic buildings and old milling operations.

Take a step back in time and run or hike where the settlers of the west once walked! These trail races are hosted by the historic Eaton's Ranch, the country's oldest operating dude ranch located at the base of the Bighorn Mountains outside Sheridan, WY. Test your Wyoming grit on September 17th.

Make no mistake, the elevation profile for The Sheep Mountain 50 mile and 50k are docile looking. However, the average elevation of over 10,500’ and copious amounts of aggressive terrain, […]

The Endure 12-Hour is a one-of-a-kind challenging 12-Hour timed event, designed by YOU… and tiny colorful balls. Each runner will pull colored balls from a bucket, which determines the loop they’ll […]

Taking place on the trails between Horsetooth Mountain Park and the Devil’s Backbone Open Space, the Blue Sky courses take you on a north-south tour of the easternmost hogbacks of […]