Nagano Pref., Japan · Saturday, June 5, 2027

Fixed Distance 50K

Okushinano 100 - 50 km

275 days away

52.4 km Distance

2,390 m Climbing

6.2 Grit · Hardcore

What the course asks

Climbing rate 46 m / km Mountain. Significant climbing. Steep sections will require power hiking.

Time limit 11.5 hours 13:10 min/km average. Generous. Walkable throughout for most of the field. More forgiving than 62% of 50K races. Measured against 982 races of the same distance. Cut-off calculator →

Field size ~332 Large. Rarely out of sight of another runner.

DUV results for the 2026 edition (52.4km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, June

Daylight 14 h 30 m of light

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a mountain course. Poles are highly recommended for the sustained climbs.

By UltraHub Expert

👟 gear

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

By UltraHub Expert

Gear for this race

Chosen for 52 km of trail with 2,390 m of ascent.

Trail Running Shoes 46 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 52 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 2,390 m of ascent to walk up.
GPS Watches Battery life first — a 52 km day outlasts most full-GPS modes.