Minami aso, Japan · Saturday, December 19, 2026

Fixed Distance 50K

Minami-aso caldera Trail

107 days away

50 km Distance

2,491 m Climbing

6.2 Grit · Hardcore

32.8827° N, 131.0947° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 50 m / km Mountain. Significant climbing. Steep sections will require power hiking.

Field size ~128 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2025 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, December

Daytime high 7°C

Night low -1°C

Rainfall Mostly dry

Daylight 9 h 59 m of light

Regional 2001-2020 average for December — NASA POWER, grid elevation 616 m. Not a forecast.

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 50 km of trail with 2,491 m of ascent.

Trail Running Shoes 50 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 50 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 2,491 m of ascent to walk up.
GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.