Ultra Running Hub Wellsboro, PA, United States · Sunday, October 11, 2026
Green Monster Trail Challenge 50K
What the course asks
DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, October
Regional 2001-2020 average for October — NASA POWER, grid elevation 515 m. Not a forecast.
The Aid Station
Course-specific beta from the community
This is a mountain course. Poles are highly recommended for the sustained climbs.
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 50 km of trail with 2,300 m of ascent.
- Trail Running Shoes46 m of climb per kilometre — grip and rock protection before cushioning.
- Race Nutrition50 km of self-supported fuelling between aid stations.
- Hydration VestsPole attachment and chest-strap stability on steep ground.
- Trekking Poles2,300 m of ascent to walk up.
- GPS WatchesBattery life first — a 50 km day outlasts most full-GPS modes.
Course Notes
The race is nestled in the mountains of the Tioga State Forest just North of the PA Grand Canyon. Challenging single track trails, steep climbs, and technical descents all of which are very unforgiving. Several stream crossings.
Similar races
Other 50K trail ultras, closest in distance first.