Ultra Running Hub Okinoshima, Shimane Pref., Japan · Sunday, June 21, 2026
Fixed Distance 50K
Okinoshima 50km Ultra Marathon
Race completed
50 km Distance
not publishedn/a Climbing
2.5 est Grit · Entry level
Calculated from 50 km alone — the organiser has not published an elevation profile. Read 2.5 as a floor, not a verdict.
What the course asks
Time limit 8 hours
9:36 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 Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Tighter than 89% of 50K races. Measured against 982 races of the same distance. Cut-off calculator →
Field size ~454 Large. Rarely out of sight of another runner.
DUV results for the 2026 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, June
Daytime high 22°C
Night low 20°C
Rainfall Showers likely
Daylight 14 h 38 m of light
Regional 2001-2020 average for June — NASA POWER, grid elevation 10 m. Not a forecast.
The Aid Station
Course-specific beta from the community
With road terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 50 km of road.
- Trail Running Shoes 50 km of road — cushioning that is still there in the last quarter.
- Race Nutrition 50 km of self-supported fuelling between aid stations.
- Hydration Vests Flask capacity for 50 km, without the bounce.
- GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.
Course Notes
Einmal rund um die Insel Dodo (Oki-Inseln). Der 50km-Lauf startet um 11:30 Uhr bei Km 50 des 100km-Laufes.
Similar races
Other 50K road ultras, closest in distance first.