Relay ultramarathons in Iowa, United States

48-hour format with 4-mile loops every 4 hours on mixed paved trails and disc golf course terrain, featuring night running and optional bonus lap

75-mile relay from Jefferson to Des Moines with 18 exchange points, highlighting Iowa countryside, small towns, and team camaraderie

Multi-loop 9-hour endurance run on Schuetzen Park trails, solo or relay format, with aid stations and the challenge of accumulating maximum distance