Napa, CA, United States · Saturday, May 15, 2027

Fixed Distance 50 mi

Rim Rock 50 Mile Trail Challenge

241 days away

80 km Distance

not publishedn/a Climbing

4.0 est Grit · Challenging

Calculated from 80 km alone — the organiser has not published an elevation profile. Read 4.0 as a floor, not a verdict.

38.2971° N, 122.2855° W© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Field size ~10 Tiny. You will run alone for most of it.

DUV results for the 2026 edition (50mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, May

Daytime high 23°C

Night low 9°C

Rainfall Dry — rain unlikely

Daylight 14 h 13 m of light

Regional 2001-2020 average for May — NASA POWER, grid elevation 266 m. Not a forecast.

The Aid Station

Course-specific beta from the community

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

Gear for this race

Chosen for 80 km of trail.

Trail Running Shoes80 km of trail — cushioning that is still there in the last quarter.
Race Nutrition80 km of self-supported fuelling between aid stations.
Hydration VestsFlask capacity for 80 km, without the bounce.
Headlamps80 km almost certainly means running into the night.
GPS WatchesBattery life first — a 80 km day outlasts most full-GPS modes.

Salomon