The Green Monster Trail Challenge returns to Wellsboro, Pennsylvania on October 11th, offering a grueling yet rewarding experience for runners and hikers of all ages and abilities. Nestled in the mountains of Tioga State Forest just north of the PA Grand Canyon, this trail challenge is organized by the Tyoga Running Club with the mission to showcase both the beauty and difficulty of the local terrain. Race morning arrives early as participants gather at the start line on Straight Run Road near Wellsboro’s lush greenery. The crisp fall air settles around 11 degrees Celsius while dew glistens across the trailhead, a clear indication that this is no ordinary run or hike. Temperatures are expected to range from an average of 6.8C in the early morning hours to a high of 16.2C by afternoon, with winds averaging at around 12 kilometers per hour and humidity levels staying consistently high. The Green Monster Trail Challenge has been a tradition since its inception as part of the One Darn Tough Mountain Race series, attracting close to 350 participants annually who come for more than just the challenge. The event raises funds for various community projects supported by local organizations dedicated to enriching the lives of residents in Wellsboro and beyond. The course itself is a mix of rolling single-track trails winding through Tioga State Forest with steep climbs, abundant stream crossings, and technical descents that cater to both experienced athletes and casual trail enthusiasts. Aid stations are meticulously maintained throughout the route offering necessary nutrition and hydration for runners tackling either the 15k, 25k or monstrous 50k distances. Weather conditions in Wellsboro during October typically present a mix of firm yet slightly soft trails underfoot with an average UV index around moderate levels. Precipitation is possible but generally light at about 2.2mm per day on race mornings when the sun shines for nearly eight hours and temperatures remain relatively cool throughout the morning run.
50K 50K • Start: 07:30:00 • Fee: $75.00
25K 25K • Start: 09:00:00 • Fee: $75.00
15K 15K • Start: 10:45:00 • Fee: $75.00
The Green Monster Trail Challenge offers a grueling yet rewarding experience for runners and hikers of all abilities, with distances ranging from the manageable 15k option to the formidable 25k and monstrous 50k challenge. Each distance features steep climbs, technical descents, abundant stream crossings, and superbly maintained aid stations spaced strategically along the course. Registration for this event is managed exclusively through https://ultrasignup.com/register.aspx?did=135898 at a flat fee of $75 per entry regardless of which race distance you choose. Given that capacity is limited to 350 participants, interested runners are advised to secure their spot well in advance by the registration deadline set for midnight September 27th. Participants must pick up their bibs and other necessary materials at Straight Run Road on October 10th between noon and six PM or directly after at the race day start location starting from seven AM. All registrants are encouraged to bring proper identification if picking up packets ahead of time. Age requirements apply, with all participants needing to be a minimum age appropriate for their chosen distance. The Green Monster Trail Challenge in Wellsboro, Pennsylvania on October 11th is an event not just for the faint-hearted but also for those who appreciate challenging terrain and beautiful landscapes while contributing back to local community projects through participation fees.
Races Offered
50K
Oct 11, 2026
straighten
Distance —
50K
terrain
Type —
Running
timer
07:30
sell
$75.00
25K
Oct 11, 2026
straighten
Distance —
25K
terrain
Type —
Running
timer
09:00
sell
$75.00
15K
Oct 11, 2026
straighten
Distance —
15K
terrain
Type —
Running
timer
10:45
sell
$75.00
Weather History
These values represent the 3-year monthly averages for October in Wellsboro.
thermostatTemperature
6.8° / 16.2°
wb_sunnyFeels like
3.6° / 13.1°
light_mode
Avg sunshine hours
7h 50m
water_drop
Avg rainfall
2.2 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
12.0 km/h (Gentle breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (4.0)
humidity_mid
Humidity
73.8%
wb_twilight
Sunrise
07:23
nightlight
Sunset
18:26
About Wellsboro
Learn more about the host city, Wellsboro.
Wellsboro, Pennsylvania is the county seat of Tioga County, Pennsylvania. Wellsboro is an old fashion, historic town that still depicts life as the way it used to be back in the 1900s. Downtown Wellsboro still has the authentic gas street lamps and the historic buildings. The town offers a variety of interesting sights to visit and fun activities to participate in. Wellsboro is definitely a place for the outdoors lover because of its location within the wilderness.
