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Green Monster Trail Challenge

Wellsboro, United States • 12 Oct 2025

The Green Monster Trail Challenge is a demanding trail running and hiking event held in the scenic Tioga State Forest near Wellsboro, Pennsylvania. Offering three distance options—15K, 25K, and a grueling 50K—the course features challenging terrain with steep climbs, technical descents, rolling single-track trails, and multiple stream crossings. Total ascent ranges from 1,700 feet for the 15K to 7,800 feet for the 50K, making it a true test of endurance and skill. The event fosters a vibrant atmosphere with well-maintained aid stations staffed by local volunteers, post-race food and entertainment, finisher awards, and race swag. Limited to 350 participants, it emphasizes community spirit and a rugged outdoor experience. Visit the organization's website for the most recent information.

United States Pennsylvania Wellsboro

Race information

Website
50 km
7800 m+
50k
25 km
4000 m+
25k
15 km
1700 m+
15k
Visit the organization's website for the most recent information.
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