Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, mile by mile.
Race-day light
For a 11:05 finish (an estimate) · starting 7:00 AM May 30. Dark means the sun below civil twilight.
Climbs
6 climbs · 4,823 ft totalbiggest firstElevation gain, measured two ways
| Source | Gain | vs lidar |
|---|---|---|
| Course file (GPX) | 6,903ft | +16% |
| USGS lidar, 1 m | 5,945ft | 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 25, 2026. The planner still uses the course file.
Aid stations as published on the course file
| Aid station | Mile | km |
|---|---|---|
| Start / Finish | 0.0 | 0.0 |
| S/F | 0.0 | 0.0 |
| A Colorado Trail Aid | 4.8 | 7.7 |
| A Colorado Trail Aid | 4.8 | 7.7 |
| A Kelsey Campground Aid | 11.1 | 17.9 |
| A Kelsey Aid | 11.1 | 17.9 |
| A Shinglemill Aid | 17.3 | 27.8 |
| A Shinglemill Aid | 17.3 | 27.8 |
| A Tramway Aid | 22.5 | 36.3 |
| A Tramway Aid | 22.5 | 36.3 |
| A Buffalo Creek Aid | 28.6 | 46.0 |
| A Buffalo Aid | 28.6 | 46.1 |
| A Rolling Creek Aid | 33.2 | 53.5 |
| A Rolling Creek Aid | 33.2 | 53.5 |
| A Homestead Aid | 43.2 | 69.4 |
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 May 30 at the start
Typical = the median of 2016–2025 for May 30 ±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 71°F at the start, with a low of 39°.
| Year | Start °F | High point °F | Rain | Wind |
|---|---|---|---|---|
| 2026 May 30 | 71°/39° | 65°/35° | dry | 10mph |
race-day weather from the Open-Meteo historical archive (ERA5) at the start line and the course high point (8,524 ft).
Reviews what runners who have been there say
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About this course
North Fork 50 Mile/50K — 2026 covers 49.4 mi (79.5 km) with 6,903 ft of elevation gain. That is about 140 ft per mile of climbing, and 6,900 ft of descent. The course tops out at 8,527 ft and bottoms out at 6,686 ft. There are 13 aid stations on course; the longest stretch between aid is 9.9 mi. The profile has 6 sustained climbs; the biggest is the climb from mi 0.1, +1,381 ft over 7.4 mi at 3.5% on average (steepest stretch 12%). Race day is May 30, 2026, starting at 7:00 AM; the sun rises at 5:38 AM and sets at 8:21 PM. Typical race-day weather at the start: a high of 70°F and a low of 44°F, with a 63% 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
- Oct 13, 2026Added to the catalog
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