Trail Running calendar near Custer 2025-2026

Old Baldy is a trail race held on the Old Baldy Trail just south of Spearfish, South Dakota. The main event covers 7.75 miles of scenic but rugged terrain through the Black Hills, featuring forested paths, rolling hills, and rewarding views near the summit—a classic South Dakota trail experience for..

XTERRA Deadwood Mickelson is a trail run event in the Black Hills of South Dakota and is part of the XTERRA Trail Run World Series. The course passes an abandoned mining town, crosses railroad trestles, goes through a mountain, passes large rock formations, follows a creek and finishes in the histo..

Black Hills 100 in Sturgis, South Dakota, offers four race options: 100-mile, 50-mile, 50K, and 30K, held June 26–27, 2026. The course starts and finishes at Sturgis City Park, looping from Sturgis to Silver City and back. The 100-mile route is about 108 miles, mostly dirt trails with a paved initia..