Iron Will 100 - Junction City, KS

The Iron Will 100 is a multi-distance ultramarathon event held in Junction City, Kansas, on September 13, 2025. Participants can choose from various race distances, including a 100-mile, 50-mile, 50K, 100K, and a 36-hour challenge. The course features a flat, fast river trail with significant shade, and aid stations are strategically placed every five miles.

The event emphasizes endurance and offers finisher awards, with cutoffs ranging from 34 to 36 hours depending on the race. Registration closes shortly before the event, and there are no refunds, but deferrals are available. The event attracts ultrarunners seeking a challenging yet scenic race experience. Visit the organization's website for the most recent information.