Ultra Running Hub Yamanouchi,Nagano Pref., Japan · Saturday, July 4, 2026
Fixed Distance 50K
KTF Trail running race - Rockin Bear
Race completed
48 km Distance
not publishedn/a Climbing
2.4 est Grit · Entry level
Calculated from 48 km alone — the organiser has not published an elevation profile. Read 2.4 as a floor, not a verdict.
What the course asks
Time limit 10 hours
12:30 min/km average. Generous. Walkable throughout for most of the field. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. About average for a 50K. Measured against 1007 races of the same distance. Cut-off calculator →
Field size ~442 Large. Rarely out of sight of another runner.
DUV results for the 2025 edition (48km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, July
Daytime high 26°C
Night low 17°C
Rainfall Wet — expect rain
Daylight 14 h 37 m of light
Regional 2001-2020 average for July — NASA POWER, grid elevation 875 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 48 km of trail.
- Trail Running Shoes48 km of trail — cushioning that is still there in the last quarter.
- Race Nutrition48 km of self-supported fuelling between aid stations.
- Hydration VestsFlask capacity for 48 km, without the bounce.
- GPS WatchesBattery life first — a 48 km day outlasts most full-GPS modes.
Similar races
Other 50K trail ultras, closest in distance first.