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Green Monster Trail Challenge

Wellsboro, United States • 11 Oct 2026

Green Monster Trail Challenge

The Green Monster Trail Challenge is a trail running event near Wellsboro, PA, in the Tioga State Forest north of the Pennsylvania Grand Canyon. The course uses rolling single-track trails and includes steep climbs, multiple stream crossings, and technical descents. Three distance options are offered: a 15K, a 25K and a 50K.

  • 50K: 7800 feet total ascent
  • 25K: 4000 feet total ascent
  • 15K: 1700 feet total ascent

The event is organized by the Tyoga Running Club. Aid stations are maintained by local clubs and organizations. Race services include post-race food and beverages, music and entertainment, race-day shirts, socks, finisher medals, and other giveaways. Cut-off time limits for the 50K were added in 2023. Field capacity is limited to 350 participants; when the field is full a wait-list is generated on a first-come first-served basis. There is no day of registration and the organizer states there are no refunds. Visit the organization's website for the most recent information.

United States Pennsylvania Wellsboro

Race information

Website
50 km
50k
25 km
25k
15 km
15k
Visit the organization's website for the most recent information.
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