Trail ultramarathons in South Dakota, United States

Scenic mountain loops with approximately 1,200 feet of elevation gain per six-mile circuit, start and finish at Bear Den Chalet

Forgiving running surface and gentle elevation changes in a small town South Dakota setting, with 50 and 100-mile ultramarathon distances.

Repeated 1.5-mile farm loop on flat dirt and pasture, surrounded by miniature animals, with variable trail conditions and on-site camping options.

4.1666-mile trail loop with 385 feet of climbing per lap in the Black Hills, building a last-athlete-standing ultra one circuit at a time.

Rolling hills and wooded trails through Newton Hills State Park, combining lush landscapes with segments of horse paths and an 8-hour 50km cutoff

Short, well-marked loop on grassy slopes and singletrack, with repeated Tut Hill climbs and steady elevation gain and loss each lap.

108-mile out-and-back from Sturgis with Centennial and Deerfield Trails, rugged singletrack, old logging roads, and dirt terrain through forests