100mi Summer ultramarathons in Wisconsin, United States

Mostly rail trail course connecting Belleville, WI to Orangeville, IL, passing through small towns and scenic stretches with frequent aid stations

Rugged Ice Age Trail route through Chequamegon-Nicolet National Forest, featuring glacial landscapes, tranquil forests, and open prairies

Primarily wooded trail with roller coaster hills, prairie and marsh stretches, soft pine needle footing, and recurring "Silent Killer" climbs