Colossal Vail 50/50
The Colossal Vail 50/50 is an adventurous ultra run on portions of the Arizona Trail near the community of Vail (24 miles southeast of Tucson). Starting and finishing at Colossal Cave Mountain Park, the 50-mile, 55K and Half-Marathon courses feature some of the greatest high desert trail running opportunities in this part of the state. [...]