Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, mile by mile.
Race-day light
For a 3:50 finish (an estimate) · starting 7:00 AM Oct 11. Dark means the sun below civil twilight.
Climbs
5 climbs · 3,514 ft totalbiggest firstConditions typical race-day weather for Oct 11 at the start
Typical = the median of 2016–2025 for Oct 11 ±3 days at the start line; a wet day has 1 mm of rain or more. Historical weather from Open-Meteo.
Race almanac 1 year of this race
Past editions
On race day it reached 58°F at the start, with a low of 52°.
| Year | Start °F | High point °F | Rain | Wind |
|---|---|---|---|---|
| 2026 Oct 11 | 58°/52° | 54°/48° | 1.00in | 13mph |
race-day weather from the Open-Meteo historical archive (ERA5) at the start line and the course high point (2,316 ft).
Reviews what runners who have been there say
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About this course
Green Monster Trail Challenge 25K — 2026 covers 16.6 mi (26.8 km) with 3,635 ft of elevation gain through Pennsylvania, United States. That is about 218 ft per mile of climbing, and 3,635 ft of descent. The course tops out at 2,316 ft and bottoms out at 1,178 ft. The surface is 49% trail, 35% gravel and 11% paved. The profile has 5 sustained climbs; the biggest is the climb from mi 0.0, +1,053 ft over 2.5 mi at 7.9% on average (steepest stretch 31%). Race day is October 11, 2026, starting at 7:00 AM; the sun rises at 7:18 AM and sets at 6:36 PM. Typical race-day weather at the start: a high of 62°F and a low of 46°F, with a 31% chance of a wet day. The interactive map above shows the full route with its elevation profile and aid stations, built from the course's GPS file.
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Course history
- Sep 3, 2026Added to the catalog
Races like this one close in distance, climbing, terrain, altitude, weather and season
- Island View - Endurance Run 25K — 2026Oct · 16 mi · 221 ft/miSimilar climbing · Same distance · Same month
- Green Monster Trail Challenge 15K — 2026Oct · 10 mi · 182 ft/mi · PASimilar weather · Similar terrain · Same month
- Rodeo Valley Trail Run 30K — 2026Aug · 19 mi · 213 ft/mi · CASimilar climbing · Same distance · Similar terrain
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