South Dakota · Sturgis

Black Hills

Founded in 2011, Black Hills runs roughly 108 miles out-and-back on the Centennial Trail (#89) and Deerfield Trail (#40) between Sturgis and the Silver City trailhead — mostly single-track with sections of ATV double-track, 16,779 feet of gain, no significant shade on exposed ridge stretches. The 34-hour cutoff is earned: the inaugural 100-mile finished at just 35%, and in 2025, 36 of 47 starters finished. Hand-painted buffalo skull trophies go to the top three in each distance.