Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, mile by mile.
Race-day light
For a 6:35 finish (an estimate) · starting 7:00 AM Feb 21. Dark means the sun below civil twilight.
Climbs
3 climbs · 948 ft totalbiggest firstElevation gain, measured two ways
| Source | Gain | vs lidar |
|---|---|---|
| Course file (GPX) | 3,360ft | +13% |
| USGS lidar, 1 m | 2,973ft | 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 26, 2026. The planner still uses the course file.
Aid stations as published on the course file
| Aid station | Mile | km |
|---|---|---|
| Start | 0.0 | 0.0 |
| A Arrowhead Aid (mile 8) | 8.2 | 13.2 |
| A Swank Aid (mile 14.5) | 14.6 | 23.5 |
| A Fayette Aid (mile 22) | 22.1 | 35.6 |
| A Mill Creek Aid (mile 29) | 29.2 | 47.0 |
| Finish | 31.2 | 50.3 |
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 Feb 21 at the start
Typical = the median of 2016–2025 for Feb 21 ±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 51°F at the start, with a low of 36°.
| Year | Start °F | Rain | Wind |
|---|---|---|---|
| 2026 Feb 21 | 51°/36° | 0.02in | 7mph |
race-day weather from the Open-Meteo historical archive (ERA5) at the start line.
Reviews what runners who have been there say
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About this course
Cabin Fever 50K — 2026 covers 31.3 mi (50.3 km) with 3,360 ft of elevation gain. That is about 108 ft per mile of climbing, and 3,885 ft of descent. The course tops out at 2,083 ft and bottoms out at 853 ft. There are 4 aid stations on course; the longest stretch between aid is 8.2 mi. The profile has 3 sustained climbs; the biggest is the climb to Mill Creek Aid (mile 29), +463 ft over 1.6 mi at 5.5% on average (steepest stretch 6%). Race day is February 21, 2026, starting at 7:00 AM; the sun rises at 7:08 AM and sets at 6:10 PM. Typical race-day weather at the start: a high of 53°F and a low of 32°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
- Oct 13, 2026Added to the catalog
Races like this one close in distance, climbing, terrain, altitude, weather and season
- Cabin Fever 50K 50 K — 2027Feb · 31 mi · 108 ft/miSame distance · Similar climbing · Similar weather
- Davids Trail Endurance Run — 2026Feb · 31 mi · 103 ft/miSame distance · Similar climbing · Same month
- Folsom Lake Sweetwater Trail Run 50K — 2027Jan · 31 mi · 106 ft/miSame distance · Similar climbing · Similar weather
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