September ultramarathons in United States (Midwest)

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

Rural Iowa backroads and the scenic Bridges of Madison County, thousands of feet of elevation gain, challenging hills, and muddy roads in wet conditions

Multi-loop ultramarathon offering official finishes and awards at 50K, 100K, 150K, or 200K; progressive distances with tiered medallion and buckle rewards

Scenic, demanding 25-mile trail loop through Camp Tuscazoar’s hills, with private property access and nighttime sections for longer distances

One-mile loop on a wide, gently rolling path of gravel, grass, and dirt with 72 feet of elevation gain per loop, illuminated for nighttime laps.

Nighttime six-hour race on a 4.1-mile loop featuring paved, gravel, and single-track dirt trail, with all laps starting and ending at the HUB

Challenging 25-mile loop on single track, railroad beds, and towpath through woodlands, historic sites, and river views with up to 10,000 feet of elevation gain

Scenic 3.2-mile loop with singletrack and gravel, 200 feet of elevation per lap, varied terrain in a tranquil 180-acre Iowa park

Steep hills and rugged trails around Dover, Ohio; a hard, no-frills 100-mile test shaped by darkness, fatigue, pain, and natural beauty.

Backyard ultra format with a varied loop of gravel, asphalt and trail, hour-by-hour returns, and a sauna-and-swim touch.

Trail course weaving through Michigan forests, century-old white pines, camp areas, Potawatomi, BBT, and Waterloo Pinckney trails amid rolling landscapes.

95% singletrack on the Superior Hiking Trail, with roots, rocks and relentless climbs through the Sawtooth Mountains above Lake Superior.

50K trail race with Triple Crown options up to 85K, touring wooded park trails from Red Oak picnic area in Rock Cut State Park

Nine hours and eleven minutes on a one-mile loop honoring first responders, team spirit, and community support

Technical, rolling 25-mile loops through Clinton State Park with challenging terrain and scenic views

Scenic 1-mile paved loop in a 58-acre city park, rotating hourly challenges, 6- or 12-hour format, solo or relay options, central aid station and vendor

Scenic four-loop course through cedar forests, rolling prairies, and along Twin Creek, with 3,000 feet of elevation gain and varied terrain

95% singletrack course weaving under mature trees, past lakes and waterfalls, with 1,397 feet of gain per 25K loop and highlights like the Covered Bridge

Trail routes through Hocking Hills State Park and State Forest, featuring stream crossings, deep gorges, dense woodlands, and significant elevation changes