Trail Running calendar near Sundance 2026-2027

Big Hill is a trail run near Spearfish, South Dakota on May 17, 2026. It features 5K, 8 mile and a kids 1K with youth free entries and member discounts during registration.

BearLodge 10K on May 31, 2026 at Reuter Campground in Sundance WY is a 10K trail race through forested terrain with rolling elevation changes. A post race BBQ is planned and early registrants may receive socks.

Two days of trail events on the Mickelson Trail near Deadwood, South Dakota, featuring marathon and half marathon distances plus relay, 5K, kids 1K and a guided hike. Entry limits and tiered registration fees apply by race.

A fast downhill 5 km on the Mickelson Trail in Deadwood during the Deadwood Mickelson Trail Marathon weekend. A 1 km kids race is held the same day.

A trail event weekend based in Sturgis with races on the Centennial and Deerfield trails, offering distances from 30K to a 100 mile course listed near 108 miles and supported by multiple aid stations and drop bag locations.

Trail and road courses at Tomaha Trail in Hisega, South Dakota offering 30K, half marathon and 10K distances with published maps, shuttle service to starts, member discounts, and a shirt guarantee date before the race.

Lean Horse Ultra is a multi-distance trail running event on the George S. Mickelson Trail in the Black Hills, held July 31 to August 1, 2026, with 100 mile, relay, 50, 30, and 20 mile options and a CrossFit edition.

A fundraising mountain bike and trail running event at Big Hill Trails supporting Northern Hills Area CASA. Riders and runners complete as many laps as possible in three hour or six hour formats on looped courses with aid stations and campi..

A backyard ultra on a 4.167 mile loop in the Black Hills with hourly starts, on-course aid, no cell service at the trailhead, and free parking-area camping.

Final race of the 2026 Black Hills Runners Club Trail Series at Alkali Trailhead in Sturgis, SD, with 10K and 18K courses through rolling hills and pine singletrack; youth entries are listed as free.