Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, mile by mile.
Race-day light
For a 7:00 finish (an estimate) · starting 7:00 AM Aug 15. Dark means the sun below civil twilight.
Climbs
8 climbs · 6,036 ft totalbiggest firstConditions typical race-day weather for Aug 15 at the start
Typical = the median of 2016–2025 for Aug 15 ±3 days at the start line; a wet day has 1 mm of rain or more. Historical weather from Open-Meteo.
Race almanac 2 years of this race
Past editions
Race-day highs at the start ran from 67° to 71°F, and none of 2 race days was wet.
| Year | Start °F | High point °F | Rain | Wind |
|---|---|---|---|---|
| 2026 Aug 15 | 67°/56° | 61°/51° | dry | 10mph |
| 2025 Aug 16 | 71°/58° | 66°/53° | dry | 18mph |
race-day weather from the Open-Meteo historical archive (ERA5) at the start line and the course high point (1,522 ft).
Reviews what runners who have been there say
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About this course
Tamalpa Headlands 50K — 2026 covers 31.3 mi (50.4 km) with 6,771 ft of elevation gain through California, United States. That is about 216 ft per mile of climbing, and 6,769 ft of descent. The course tops out at 1,530 ft and bottoms out at 12 ft. The surface is 63% trail, 31% gravel and 5% paved. The profile has 8 sustained climbs; the biggest is the climb from mi 18.2, +1,408 ft over 3.2 mi at 8.2% on average (steepest stretch 21%). Race day is August 15, 2026, starting at 7:00 AM; the sun rises at 6:27 AM and sets at 8:05 PM. Typical race-day weather at the start: a high of 73°F and a low of 57°F, with a 1% 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
- Jul 27, 2026Added to the catalog
Races like this one close in distance, climbing, terrain, altitude, weather and season
- Larrabee Lakes — 2026Aug · 31 mi · 213 ft/mi · WASame distance · Mostly trail · Similar climbing
- Rodeo Valley Trail Run — 2026Aug · 31 mi · 208 ft/mi · CASame distance · Similar climbing · Similar weather
- Berkeley Trail Adventure — 2026Sep · 31 mi · 187 ft/mi · CASimilar weather · Same distance · Similar terrain
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