Trail Running calendar near Spearfish 2026-2027

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.

XTERRA Deadwood Mickelson runs June 6-7, 2026 in Deadwood, South Dakota, with marathon, half, relay, 5K and kids races on the Mickelson Trail. The USATF certified course passes trestles, rock formations and creekside sections and is a Bosto..

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.

The Rattler 5 Miler is a roughly five-mile community race in Rapid City on June 13, 2026, centered at Black Hills Running Company and routed through Hanson-Larsen Memorial Park. Entrants receive a custom July 2026 to June 2027 trail calenda..

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.

An annual ultramarathon in the Black Hills of South Dakota on the George S. Mickelson Trail. Races include 100 mile, 50 mile, 30 mile, 20 mile, and a 30 mile CrossFit relay option.

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 last-person-standing backyard ultra near Spearfish, SD, run on repeated 4.167-mile loops with about 375 ft elevation change per loop on wide Big Hill trails. Aid station, free trailhead camping, and milestone awards included.

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.