A behemoth of running races, the adidas Terrex 20K Trail Run is for the boldest competitors. Destroy a near-half marathon on a difficult course that spans nearly the entire front side of Vail Mountain!

One of the more challenging and rewarding 20Ks in the nation, line up alongside some of the Vail Valley’s best trail runners and top professionals at over 8,000 feet. This course — two laps on the 10K course — will truly test your fitness with its constant elevation changes and mountainous terrain. In addition to pride points on the line, the 20K prize purse is also up for grabs!