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Green Monster Trail Challenge Course Guide

The Green Monster Trail Challenge is a rolling, climb-heavy 50K through Tioga State Forest near Wellsboro, Pennsylvania, just north of the PA Grand Canyon. Steep climb after steep climb, abundant stream crossings, and four staged cutoffs that punish a slow start. I will walk you through the course first, then give you a pacing and fueling plan built for the terrain. There are free calculators along the way to dial in your own numbers.

⏵ At a glance

Green Monster Trail Challenge quick facts

Date
Sunday, October 11, 2026, 7:30 AM start (Columbus Day weekend)
Location
Wellsboro, PA, Tioga State Forest, just north of the PA Grand Canyon
Distances
50K (marquee), 25K, and 15K
Elevation gain
50K: about 7,800 ft · 25K: about 4,000 ft · 15K: about 1,700 ft
Cutoffs (50K)
Broad Ridge AS4 (mile 14) noon, Hessel Gessel AS6 (mile 21) 2:30 PM, Frying Pan AS7 (mile 26) 4:30 PM, Scotch Pine AS8 (mile 30) 5:30 PM
Entry
50K: $110, capped at 350 runners, closes late September or sells out, no day-of registration
Organizer
Tyoga Running Club (also puts on the Pine Creek Challenge)

These facts come from the official race site and the Tyoga Running Club. Check the current date, cutoffs, and aid stations before you commit. Race logistics change year to year, and this race closes early or sells out most years.

The course: rolling singletrack, one climb after another

The 50K covers 31 miles and about 7,800 feet of climbing on rolling singletrack through Tioga State Forest. There is no single defining mountain here. It is a long series of steep climbs stacked back to back, broken up by abundant stream crossings that keep your feet wet most of the day.

Steep, repeated climbs from start to finish

The climbing on the Green Monster is relentless in a different way than a single-summit race. You get one steep grade, a short recovery, then another steep grade, and that pattern repeats for most of the day. It is not about surviving one crux climb. It is about managing your legs and your effort across dozens of shorter ones that add up to 7,800 feet by the finish.

Hike the steep pitches early and often. Trying to run every climb because each one looks short is how your legs are gone by mile 20.

Stream crossings and technical descents

Expect abundant stream crossings throughout the course, so plan on wet feet for a good chunk of the day. The Tyoga Running Club leaf-blows the course before race day to keep the footing manageable, but the descents are still technical Pennsylvania trail, with roots and rock under the leaves. Quick feet and attention matter as much as fitness on the way down.

Do not fight the wet feet. Pick a sock and shoe setup that handles being wet for hours, and stop worrying about staying dry after the first crossing. Chasing dry feet on this course just wastes time and energy.

The staged cutoffs and how they shape your day

This is the heart of the race, pacing-wise: four staged cutoffs at Broad Ridge (mile 14, noon), Hessel Gessel (mile 21, 2:30 PM), Frying Pan (mile 26, 4:30 PM), and Scotch Pine (mile 30, 5:30 PM). Spaced cutoffs like these are less forgiving than a single overall limit, because a slow first quarter puts you behind for the rest of the day instead of leaving you free to make it up late.

Know each cutoff and where you need to be relative to it, not just the final one. Arriving at Broad Ridge with 10 minutes to spare is a warning sign, not a plan.

Pacing strategy for staged cutoffs and repeated climbs

With four staged cutoffs and 7,800 feet of gain spread across dozens of shorter climbs, the Green Monster rewards even effort over a fast start you cannot sustain.

Pace by grade, not by feel on each individual climb

Because the climbs here are short and repeated instead of one long grind, it is easy to run each one a little too hard since it never lasts that long on its own. That adds up. A grade-adjusted pace target keeps you honest across all of them, so you arrive at mile 20 with legs still capable of running instead of just surviving.

Check your splits against every cutoff, not just the last one

A vert-aware finish prediction, built off this course profile, lets you see whether you are actually on pace for Broad Ridge, Hessel Gessel, Frying Pan, and Scotch Pine individually, not just whether you will finish inside the overall day. Run the ultra cutoff calculator against your projected splits before race day so you know exactly how much buffer you are carrying at each stage.

⏵ Free tools to pace this course

Fueling strategy for a long climbing day

Most runners are out on the Green Monster course for many hours, with steady climbing the whole way and regular staged aid to restock along the route.

Carbs: steady, and use the staged aid

Aim for 60 to 90 grams of carbohydrate per hour, and only push toward the higher end once your gut is trained for it. Because the aid stations sit at fairly regular intervals along the course, you do not need to carry a huge reserve between them. Use the staged stops to restock instead of overloading your vest at the start.

Sodium and fluid: scale to the October weather

Sodium in the 300 to 700 mg per liter range covers most runners here, and you want to lean toward the higher end if the October weather runs warm, since Columbus Day weekend in Pennsylvania can still bring a genuinely warm day. Between the sustained climbing and the wet feet from stream crossings, pay attention to how your body is handling the effort and adjust rather than sticking rigidly to a plan built for a cooler forecast.

⏵ Build your fueling plan

Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and the Green Monster climbing with the free ultra fueling calculator. Browse the rest of the free running tools at the tools hub.

⏵ Free calculators for this race

Run your Green Monster numbers with our free, no-signup tools, then let Summit Line tie them back to your real fitness and this exact course.

See all free running tools →

⏵ Train for it with Summit Line

Get a race-day plan built around YOUR fitness, this exact climbing profile, and your projected splits against every staged cutoff. Summit Line reads your real training and rehearses your fueling so race day is something you execute, not guess at.

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Green Monster Trail Challenge FAQ

How hard is the Green Monster Trail Challenge?

The Green Monster 50K is a legitimate mountain 50K, with about 7,800 feet of climbing over 31 miles of rolling singletrack in Tioga State Forest. It is not one big mountain, it is a long series of steep climbs stacked back to back, plus abundant stream crossings that keep your feet wet most of the day. The organizers leaf-blow the course before race day, which tells you something about how technical the footing would be otherwise. Four staged cutoffs mean you cannot bank time early and coast late, so this rewards even pacing over a fast start.

How much climbing is in the Green Monster 50K?

The 50K carries about 7,800 feet of total elevation gain. The 25K option has about 4,000 feet and the 15K has about 1,700 feet, so all three distances share the same rolling, climb-heavy character of Tioga State Forest, just at different lengths. There is no single defining mountain here. It is steep climb after steep climb, which adds up fast over 31 miles.

What are the cutoff times for the Green Monster Trail Challenge?

The 50K has four staged cutoffs: Broad Ridge aid station 4 at mile 14 by noon, Hessel Gessel aid station 6 at mile 21 by 2:30 PM, Frying Pan aid station 7 at mile 26 by 4:30 PM, and Scotch Pine aid station 8 at mile 30 by 5:30 PM. Spaced cutoffs like these punish a slow start more than a single overall time limit does, so know each one and build your pacing plan around hitting them with room to spare, not exactly on the line.

How should I fuel for the Green Monster 50K?

Plan for a multi-hour effort with real, sustained climbing and wet feet from the stream crossings. Most runners do well on roughly 60 to 90 grams of carbohydrate per hour, and sodium in the 300 to 700 mg per liter range, scaled up if the October weather runs warm. The staged aid stations give you regular chances to restock, so use them, and do not carry more than you need between checkpoints on a course this climb-heavy.

What is the terrain like at Tioga State Forest?

Expect rolling singletrack with steep, repeated climbs and abundant stream crossings, just north of the PA Grand Canyon. The Tyoga Running Club leaf-blows the course before race day to keep the footing manageable, but this is still Pennsylvania trail, so roots and rock are part of the deal even on a groomed course. Your feet will be wet for a good chunk of the day from the crossings, so plan your footwear and sock choices around that instead of hoping to stay dry.

Is the Green Monster Trail Challenge a good race to build toward?

It is a solid, well-organized mountain 50K for a runner who already has some trail ultra experience and wants real vert without the extreme technicality of a race like Worlds End or Eastern States. The staged cutoffs are fair but not generous, so come in with the climbing fitness to hold a consistent pace all day. If you can manage 7,800 feet over 31 miles without blowing up on the early climbs, the Green Monster rewards that discipline.

This guide is independent and for planning only. The course details, dates, cutoffs, and aid stations come from public sources and can change year to year, so confirm the current specifics with the official race before you register or run. The fueling and pacing advice is general and not medical advice.