Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, mile by mile.
Race-day light
For a 2:50 finish (an estimate) · starting 7:00 AM Sep 19. Dark means the sun below civil twilight.
Climbs
1 climb · 1,083 ft totalbiggest firstAid stations as published on the course file
| Aid station | Mile | km |
|---|---|---|
| Start/Finish | 0.0 | 0.1 |
| A Lick Run Aid Station #1 & #2 | 4.5 | 7.3 |
Badge colours match the markers on the map above — always confirm locations and cutoffs with the race organizer.
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Conditions typical race-day weather for Sep 19 at the start
Typical = the median of 2016–2025 for Sep 19 ±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 78°F at the start, with a low of 67°.
| Year | Start °F | High point °F | Rain | Wind |
|---|---|---|---|---|
| 2026 Sep 19 | 78°/67° | 74°/64° | 0.15in | 9mph |
race-day weather from the Open-Meteo historical archive (ERA5) at the start line and the course high point (2,425 ft).
Reviews what runners who have been there say
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About this course
Grindstone by UTMB 21K — 2026 covers 13.2 mi (21.2 km) with 1,622 ft of elevation gain. That is about 123 ft per mile of climbing, and 1,616 ft of descent. The course tops out at 2,425 ft and bottoms out at 1,342 ft. There is 1 aid station on course; the longest stretch between aid is 8.7 mi. The profile has 1 sustained climb; the only one is the climb from mi 0.0, +1,083 ft over 6.2 mi at 3.3% on average (steepest stretch 34%). Race day is September 19, 2026, starting at 7:00 AM; the sun rises at 7:02 AM and sets at 7:20 PM. Typical race-day weather at the start: a high of 79°F and a low of 59°F, with a 27% 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
- Nov 1, 2026Added to the catalog
Races like this one close in distance, climbing, terrain, altitude, weather and season
- Sunset & Cider Trail Races — 2025Sep · 13 mi · 128 ft/miSame distance · Similar climbing · Same month
- Megunticook Trail Festival Halfast 20k — 2026Sep · 13 mi · 144 ft/miSame distance · Same month · Similar climbing
- Sunset & Cider Trail Races 13 Miler — 2026Oct · 13 mi · 133 ft/mi · CASame distance · Similar climbing · Similar weather
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