Trail Running calendar near Custer 2025-2026

The Black Hills 100 is a challenging ultramarathon held annually in late June in Sturgis, South Dakota, along the scenic Centennial Trail (#89) and Deerfield Trail (#40). The event offers four distances: 100 miles, 50 miles, 50 kilometers, and 30 kilometers. The 100-mile race features approximately..

The Mystic Mountain Trail Run is an annual 8-mile trail running event held in Mystic, South Dakota. Celebrating its 54th edition in 2025, the race offers a traditional trail running experience through scenic terrain near Mystic. The event features multiple divisions, including age groups from high s..

The Haven Half Marathon, 30k & 10k is a scenic running event held on the Tomaha Trail in Hisega, South Dakota. Scheduled for July 26, 2025, it offers three race distances: a challenging 30k (20.5 miles) with 2,700 feet of elevation gain, a half marathon covering 12.37 miles with 1,948 feet of elevat..

The Lean Horse Ultra Marathon is an annual running event held in August in the Black Hills of South Dakota, centered around the scenic George S. Mickelson Trail. Established in 2005, it offers multiple race distances including 100 miles, 50 miles, 30 miles, and 20 miles, along with a 100-mile relay..

The 7th Calvary Trail Run offers two scenic trail race options—a 4-mile and an 8-mile course—held at the Fort Meade Trailhead near Sturgis, South Dakota. Set in the beautiful Black Hills, the event features rugged, well-marked trails with wide-open views, ideal for both beginner and experienced trai..