Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, mile by mile.
Race-day light
For a 3:05 finish (an estimate) · starting 7:00 AM Nov 22. Dark means the sun below civil twilight.
Climbs
4 climbs · 2,170 ft totalbiggest firstElevation gain, measured two ways
| Source | Gain | vs lidar |
|---|---|---|
| Course file (GPX) | 2,740ft | +10% |
| USGS lidar, 1 m | 2,482ft | 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.
Conditions typical race-day weather for Nov 22 at the start
Typical = the median of 2016–2025 for Nov 22 ±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 55°F at the start, with a low of 31°.
| Year | Start °F | High point °F | Rain | Wind |
|---|---|---|---|---|
| 2025 Nov 22 | 55°/31° | 49°/29° | dry | 6mph |
race-day weather from the Open-Meteo historical archive (ERA5) at the start line and the course high point (7,897 ft).
Reviews what runners who have been there say
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About this course
Colorado Cold Rush Ultra — 2025 covers 13.0 mi (21.0 km) with 2,740 ft of elevation gain. That is about 210 ft per mile of climbing, and 2,740 ft of descent. The course tops out at 7,897 ft and bottoms out at 6,175 ft. The profile has 4 sustained climbs; the biggest is the climb from mi 2.6, +1,216 ft over 3.0 mi at 7.7% on average (steepest stretch 22%). Race day is November 22, 2025, starting at 7:00 AM; the sun rises at 6:51 AM and sets at 4:42 PM. Typical race-day weather at the start: a high of 48°F and a low of 27°F, with a 21% 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
- Colorado Cold Rush Ultra 1/2 Marathon — 2026Nov · 13 mi · 210 ft/mi · COSame distance · Similar climbing · Similar weather
- Chiang Mai Thailand by UTMB INTHANON 20 20K — 2026Nov · 13 mi · 211 ft/miSimilar climbing · Same distance · Same month
- Moscow Mountain Madness 1/2 Marathon — 2026Oct · 13 mi · 214 ft/miSame distance · Similar climbing
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