Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, mile by mile.
Race-day light
For a 7:25 finish (an estimate) · starting 7:00 AM Apr 4. Dark means the sun below civil twilight.
Climbs
12 climbs · 3,766 ft totalbiggest firstElevation gain, measured two ways
| Source | Gain | vs lidar |
|---|---|---|
| Course file (GPX) | 7,357ft | +18% |
| USGS lidar, 1 m | 6,256ft | reference |
They differ because a GPS file picks up noise on every wiggle and often takes its heights from a coarse terrain model, while lidar maps the ground itself to about a metre. We sampled this route every 98 ft against USGS 3DEP and counted each rise of 10 ft or more, on Oct 24, 2026. The planner still uses the course file.
Aid stations as published on the course file
| Aid station | Mile | km |
|---|---|---|
| A Quarry Aid Station (lap 1) | 5.2 | 8.3 |
| A Chestnut Aid Station (lap 1) | 8.4 | 13.6 |
| A Quarry Aid Station (lap 2) | 21.1 | 34.0 |
| A Chestnut Aid Station (lap 2) | 24.4 | 39.2 |
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 Apr 4 at the start
Typical = the median of 2016–2025 for Apr 4 ±3 days at the start line; a wet day has 1 mm of rain or more. Historical weather from Open-Meteo.
Race almanac the sky on race day
Next race day Sun, Apr 4, 2027 · 7:00 AM start
First and last light are civil twilight, the sun 6° below the horizon. The moon is lit as at midnight after the start; headlamp hours count a typical finish from the start while the sun is below civil twilight. Worked out for the start line.
Reviews what runners who have been there say
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About this course
Sleeping Giant Trail Runs 50K — 2027 covers 31.9 mi (51.3 km) with 7,357 ft of elevation gain through Connecticut, United States. That is about 231 ft per mile of climbing, and 7,382 ft of descent. The course tops out at 721 ft and bottoms out at 87 ft. The surface is 86% trail and 14% gravel. There are 4 aid stations on course; the longest stretch between aid is 12.7 mi. The profile has 12 sustained climbs; the biggest is the climb to Quarry Aid Station (lap 1), +477 ft over 0.3 mi at 27.8% on average (steepest stretch 54%). Race day is April 4, 2027, starting at 7:00 AM; the sun rises at 6:31 AM and sets at 7:20 PM. Typical race-day weather at the start: a high of 52°F and a low of 36°F, with a 47% 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
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