Experience the annual organized spring hike up the world’s largest mountain carving-in-progress, Crazy Horse Memorial. The 10K (6.2-mile) route, round-trip, takes up to four hours to complete, with hikers setting their own pace. The terrain is hilly and rough with some steep inclines. Starting time is anytime between 8 a.m. and 1 p.m. There is also a Fall Volksmarch which takes place the same weekend as the Custer State Park Buffalo Roundup (late September). Volksmarches are held as weather permits.