Green Monster Trail Challenge

OCT
11
2026
A mountain trail event near Wellsboro, PA offering 15K, 25K and 50K routes with substantial elevation gain and maintained aid stations. The race is limited to 350 runners, has a no refund policy, and no day of registration.
Sun 11 Oct 2026
50 kilometers 25 kilometers 15 kilometers

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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 event is organized by the Tyoga Running Club and offers multiple distance options on mountain single track and mixed trails.

The course includes rolling single track, steep climbs, numerous stream crossings, and technical descents. Aid stations are maintained by local clubs and volunteers and provide nutrition and support along the course. The event features post race food and beverages, music and entertainment, race day shirts, Darn Tough socks, finisher medals, and additional giveaways.

Key logistical details include a field capacity limit of 350 participants, no day of registration, and a first come first served wait-list when the field is full. Organizers state a no refund policy and note that cut off time limits for the 50K have been updated as of 2023. The event lists total ascent for each distance.

Distances: Visit the organization's website for the most recent information.

  • 50K with 7800 feet total ascent
  • 25K with 4000 feet total ascent
  • 15K with 1700 feet total ascent
50 km
50k
25 km
25k
15 km
15k
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