The Mt Sopris Run-Off takes place in Carbondale, CO and offers two distances – 10-Miles and 28k. Historically this race has been a part of the Town of Carbondale’s Mountain Fair Weekend in late July. In 2026, the race will take place on Sunday, May 17th as part of a growing trail running festival weekend in the Roaring Fork Valley. The race will feature two distances – 10-miles and 28k – both utilizing the iconic “Up & Over” single track trail in a point-to-point race. The 28k will start at 7:30 a.m. and the 10 miler will start at 8:00 a.m. Both races will start at Flying Dog Ranch in Carbondale, and end at Rock Bottom Ranch in Basalt.