Pennsylvania · 50K · 25K · 15K
Green Monster Trail Challenge
Green Monster Trail Challenge is a 50K, 25K and 15K event held in Wellsboro, Pennsylvania. It was last held on October 11, 2026 and is usually run in October; the next date hasn't been announced yet. About 350 runners take part across all distances.
- Usually held
- October
- Location
- Wellsboro, PA
- Field size
- ~350 runners
Race details
- Last held
- October 11, 2026
- Usually held in
- October
- Location
- Wellsboro, Pennsylvania
- Distances
- 50K, 25K, 15K
- Field size
- About 350 runners
- Course
- Very hilly, technical mountain trail: organizer-reported total ascent of 1,700 ft (15K), 4,000 ft (25K), and 7,800 ft (50K).
- Registration
- greenmonster-trailchallenge.com
- Official website
- sites.google.com
Registration, course & weather
- Registration status
- Registration status as last checked September 28, 2026: open
- Start time
- 7:30 AM EDT
- Course profile — 15K
- Loop course; Trail surface; 1700 ft gain (official course data)
- Course profile — 25K
- Loop course; Trail surface; 4000 ft gain (official course data)
- Course profile — 50K
- Loop course; Trail surface; 7800 ft gain (official course data)
About the Green Monster Trail Challenge
The Green Monster Trail Challenge is a mountain trail race organized by the Tyoga Running Club in Tioga State Forest near Wellsboro, PA, just north of the Pennsylvania Grand Canyon. Runners choose a 15K, 25K, or 50K distance on rocky, rooty singletrack with repeated steep climbs and descents and numerous stream crossings.
More races in Wellsboro
-
Conquer the Canyon Marathon Race Festival: Marathon, Half Marathon, 10K and 5KWellsboro, PAMarathonHalf Marathon10K5K ~2 runners
More upcoming races in Pennsylvania
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Mother of Mercy Academy's Howl-O-Ween Spooktacular 5k Walk/Run and Kids 1 Mile Fun RunMckeesport, PA5K1 Mile
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- Blog All guides Planning advice for finding, choosing and travelling to races.
Green Monster Trail Challenge: common questions
- When is the Green Monster Trail Challenge?
- The next date hasn't been announced in the listing yet. The race is usually held in October. Check the organiser's website for the official date.
- Where is the Green Monster Trail Challenge held?
- In Wellsboro, Pennsylvania.
- What distances does the Green Monster Trail Challenge offer?
- 50K, 25K and 15K.
- How many people run the Green Monster Trail Challenge?
- About 350 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Green Monster Trail Challenge?
- Registration is handled by the organiser at greenmonster-trailchallenge.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Green Monster Trail Challenge?
- Registration status as last checked September 28, 2026: open.
- What time does the Green Monster Trail Challenge start?
- 7:30 AM EDT.
Plan this race in RaceRove
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