MammothMarch Illinois

The MammothMarch Illinois is a long-distance hiking challenge scheduled for Saturday, May 16, 2026, at the Jim Edgar Panther Creek State Fish and Wildlife Area. The event task involves completing a 20-mile hiking loop within an 8-hour time limit. The 2026 edition is currently sold out, though a waitlist remains active for those interested in joining this outdoor endurance community.

The 20-mile course takes hikers through one of the largest public access areas in Illinois, encompassing over 16,500 acres. The landscape features a diverse mix of mature forests, agricultural lands, grasslands, and rare hill prairies. This variety provides a scenic backdrop for the "MammothMarch addicts" who pursue the finisher medal and the personal satisfaction of mastering a significant physical challenge in a single day.

The host site, Jim Edgar Panther Creek, is situated in Central Illinois and is a major hub for regional outdoor recreation, including hunting, fishing, and extensive trail use. The village of Chandlerville serves as the local gateway to the park's rugged terrain. Organized support and refreshments are provided at intervals to assist hikers in maintaining the necessary pace to meet the 8-hour cutoff. For additional technical details regarding trail conditions or waitlist updates, the MammothMarch Event Team is available through their official website.