September ultramarathons in Iowa, United States

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

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

4.167-mile loop through South Park and Pollmiller Lake Campgrounds, 80% paved with gravel and trail sections, 175 feet elevation change per loop

Three-loop 30-mile course around lake and campground, wood chip trails, gravel roads, grassy fields, technical wooded sections, and uneven terrain

Looped 4.167-mile course on Lake Ahquabi State Park trails with hourly starts under the last man standing format