Muraoka, Hyogo Pref., Japan · Sunday, September 27, 2026

Fixed Distance 100K

Muraoka 100 km Ultra Marathon

24 days to go

100 km Distance

2,550 m Climbing

8.8 Grit · Elite / extreme

35.4706° N, 134.5983° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 26 m / km Rolling. Moderate undulations. Requires consistent effort across varying grades.

Time limit 14 hours 8:24 min/km average. Comfortable. Room to walk the climbs and stop at aid. Tighter than 85% of 100K races. Measured against 203 races of the same distance. Cut-off calculator →

Field size ~424 Large. Rarely out of sight of another runner.

DUV results for the 2025 edition (100km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, September

Daytime high 25°C

Night low 19°C

Rainfall Wet — expect rain

Daylight 12 h 01 m of light

Regional 2001-2020 average for September — NASA POWER, grid elevation 242 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a rolling course. Expect fast, runnable sections where rhythm is key.

By UltraHub Expert

👟 gear

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

By UltraHub Expert

🥤 nutrition

For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

By UltraHub Expert

Gear for this race

Chosen for 100 km of trail with 2,550 m of ascent.

Trail Running Shoes 26 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition Past 100 km the palate quits before the legs do — carry more than one flavour.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 2,550 m of ascent to walk up.
Headlamps A 14 h limit puts you out there after dark.