Los Alamos, NM, United States · Saturday, May 9, 2026
Fixed Distance 50 mi
Jemez Mountain 50mi Trail Run
Race completed
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.
What the course asks
Field size ~56 Small. Long stretches with nobody in sight.
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 21°C
Night low 4°C
Rainfall Dry — rain unlikely
Daylight 13 h 52 m of light
Regional 2001-2020 average for May — NASA POWER, grid elevation 2346 m. Not a forecast.
The Aid Station
Course-specific beta from the community
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
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.
Course Notes
Single track trails and dirt roads in and around Los Alamos, NM in the scenic Jemez Mountains.
Similar races
Other 50 mi trail ultras, closest in distance first.