Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, mile by mile.
Race-day light
For a 2:45 finish (an estimate) · starting 7:00 AM Aug 8. Dark means the sun below civil twilight.
Climbs
2 climbs · 1,672 ft totalbiggest firstConditions typical race-day weather for Aug 8 at the start
Typical = the median of 2016–2025 for Aug 8 ±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 82°F at the start, with a low of 64°.
| Year | Start °F | High point °F | Rain | Wind | Heat index |
|---|---|---|---|---|---|
| 2026 Aug 8 | 82°/64° | 80°/61° | 0.09in | 10mph | 84° |
race-day weather from the Open-Meteo historical archive (ERA5) at the start line and the course high point (3,655 ft).
Reviews what runners who have been there say
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About this course
Crystal Springs Ultra Races 12 hour — 2026 covers 12.4 mi (20.0 km) with 2,086 ft of elevation gain. That is about 168 ft per mile of climbing, and 2,084 ft of descent. The course tops out at 3,653 ft and bottoms out at 2,389 ft. The profile has 2 sustained climbs; the biggest is the climb from mi 0.0, +1,096 ft over 3.5 mi at 6.0% on average (steepest stretch 17%). Race day is August 8, 2026, starting at 7:00 AM; the sun rises at 6:36 AM and sets at 8:25 PM. Typical race-day weather at the start: a high of 82°F and a low of 62°F, with a 39% 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
- Sorta Mountain Stage Race Trail Half Marathon — 2026Sep · 13 mi · 170 ft/mi · INSimilar climbing · Same distance · Similar weather
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- Fabulous Fahnestock Trail Races 25K — 2026Aug · 16 mi · 165 ft/miSimilar weather · Similar climbing · Same month
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