Trail Running Calendar South Dakota 2026-2027

Ultrarunning event on the George S. Mickelson Trail in Custer South Dakota, July 31 to August 1 2026, with multiple distances on crushed limestone.

A 5K event with two options: a Pump N' Run where bench press reps reduce 5K time, and a Traditional 5K, both on Adams Homestead limestone trails in North Sioux City.

Time-based mountain bike and trail run event at Big Hill Trails supporting Northern Hills Area CASA, with 3- and 6-hour race options, team entries, aid stations, participant lunch, camping allowed, and cash prizes for breaking 6-hour bike r..

605 Trail Fest brings three trail distances to Good Earth State Park in Sioux Falls on August 15, 2026, including an 8 mile, a 4.5 mile and a 1 mile youth course. Packet pickup is scheduled the day before.

Timed running events on a 1.5 mile loop around an organic vegetable farm near Lennox, SD, with camping and a staffed aid station.

Backyard Ultra on the Big Hill trails near Spearfish SD where runners repeat 4.167 mile loops with 375 ft gain until one runner completes one more loop than others.

A weekend of march and marathon events on the Mickelson Trail near Deadwood honoring veterans, with distances from 16 to 110 miles, team and individual formats, military divisions, and rest stops every 3 to 5 miles.

Trail races at Big Sioux Recreation Area near Brandon SD featuring 5- and 2-mile courses plus a free kids mile, chip timing, and series points by age division.

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.

Trail races at Newton Hills State Park in October offering 6 mile and 2 mile courses, club organized with age division points and race awards.

Trail ultramarathon at Newton Hills State Park with 10K loops offering 20K, 30K and 50K options, substantial climbing, aid every loop, and a required state park pass.

A 50K at Tuthill Park where runners complete a 0.31 mile loop 100 times with about 90 feet of climb per loop. Entry is by essay and all donations go to charities chosen by the winners.