October ultramarathons in United States (Midwest)

24-hour race with accurate timing, emphasizing competition, personal achievement, and camaraderie on a runner-designed course

3.1-mile rolling hill loop with single-track, wide trails, grassy sections, bridge crossings, 24-hour format, heated indoor bathrooms, on-site camping

Rugged 50k trail course with creek crossings, steep climbs, and about 750 feet of elevation gain per loop through scenic Swiss Valley Nature Preserve

Flat, fast point-to-point course along the scenic Hennepin Canal from Sterling to Colona, featuring historic locks, lift bridges, and autumn farmland views

Interconnected North and South shore trails, rolling hills, technical and smooth terrain, roots and rocks, tree canopy and exposed sections in Shawnee Mission  

Rugged, remote trails through Shawnee State Forest with steep elevation, untouched wilderness stretches, and demanding technical terrain

Flat course through St. Croix State Park, forest and prairie trails, Kettle River views, historic fire tower climb, generous cutoff times

Flat 4.3-mile loop around Findlay Reservoir, zero elevation gain, smooth terrain, self-sufficiency required, last-person-standing format

Multiple-loop 50k course through Tryon Farm’s natural habitats in Michigan City, supported by on-course aid stations

Two-loop 50k on rolling single track through Deep Lake Campground’s forest trails and autumn scenery

12-hour loop featuring bike path, grass, and trail terrain in Dayton, Montgomery

Grassy ski trails with rolling hills, night running under trail lights, an approachable route just beyond marathon distance

Rugged, wooded trail loops with steep ascents and descents in Barkcamp State Park; marathon two laps, ultra three laps

Trail-centered 50K in a state park, with a clearly marked, supported course, aid stations, reliable timing, and scenic outdoor miles.

Challenging 50-mile loop through secluded Midwest wilderness with over 10,000 feet of elevation gain and rugged, remote trails

Remote gravel roads through Flint Hills prairie, open rangeland, rolling hills, 6,000 feet of climbing, scenic out-and-back and loop sections near Eureka and T.

Rugged singletrack and rolling terrain on looping courses through hardwood forests and around kettle lakes at Chain O’Lakes State Park

Flat, roughly mile-long loop with field, wooded trail and pavement, plus a small mound each lap; steady rhythm over long hours

Alternating dirt and paved 4.167-mile loops with timed laps, creek crossings, fields, cedar groves, rural countryside, and changing fall scenery