Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, mile by mile.
Race-day light
For a 10:45 finish (an estimate) · starting 7:00 AM May 15. Dark means the sun below civil twilight.
Climbs
16 climbs · 7,897 ft totalbiggest firstConditions typical race-day weather for May 15 at the start
Typical = the median of 2016–2025 for May 15 ±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 Sat, May 15, 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
Rim Rock 50 Mile Trail Challenge 50 mile solo — 2027 covers 49.4 mi (79.6 km) with 9,438 ft of elevation gain through California, United States. That is about 191 ft per mile of climbing, and 9,439 ft of descent. The course tops out at 1,631 ft and bottoms out at 23 ft. The surface is 84% trail and 16% gravel. The profile has 16 sustained climbs; the biggest is the climb from mi 14.9, +695 ft over 0.7 mi at 17.8% on average (steepest stretch 33%). Race day is May 15, 2027, starting at 7:00 AM; the sun rises at 5:59 AM and sets at 8:13 PM. Typical race-day weather at the start: a high of 73°F and a low of 49°F, with a 11% 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
Races like this one close in distance, climbing, terrain, altitude, weather and season
- Napa Wilderness Trail Runs 50K — 2027May · 32 mi · 195 ft/mi · CASimilar weather · Mostly trail · Similar climbing
- Rim Rock 50 Mile Trail Challenge Mini Rim Rock — 2027May · 50 mi · 191 ft/miSimilar weather · Same distance · Similar climbing
- Rim Rock 50 Mile Trail Challenge — 2026May · 50 mi · 191 ft/miSame distance · Similar climbing · Similar weather
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