Ultra Running Hub Fujiyoshida, Yamanashi Pref., Japan · Sunday, April 18, 2027
Fixed Distance 50 mi
Fuji 4 Lakes 80 km Challenge
227 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.
What the course asks
Time limit 11 hours
8:15 min/km average. Comfortable. Room to walk the climbs and stop at aid. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Among the tightest 50 mi cut-offs we track. Measured against 445 races of the same distance. Cut-off calculator →
Field size ~423 Large. Rarely out of sight of another runner.
DUV results for the 2026 edition (80km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, April
Daytime high 15°C
Night low 4°C
Rainfall Showers likely
Daylight 13 h 09 m of light
Regional 2001-2020 average for April — NASA POWER, grid elevation 732 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 Shoes 80 km of trail — cushioning that is still there in the last quarter.
- Race Nutrition 80 km of self-supported fuelling between aid stations.
- Hydration Vests Flask capacity for 80 km, without the bounce.
- Headlamps 80 km almost certainly means running into the night.
- GPS Watches Battery life first — a 80 km day outlasts most full-GPS modes.
Course Notes
Eine große Runde in der Region der fünf Fuji-Seen (Fuji-goko).
Similar races
Other 50 mi trail ultras, closest in distance first.