Chiba Pref., Japan · Sunday, December 13, 2026

Fixed Distance 50 mi

Coast to Coast Boso hanto

101 days away

67 km Distance

3,476 m Climbing

8.6 Grit · Elite / extreme

What the course asks

Climbing rate 52 m / km Mountain. Significant climbing. Steep sections will require power hiking.

Field size ~429 Large. Rarely out of sight of another runner.

DUV results for the 2024 edition (67km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, December

Daylight 9 h 44 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 67 km of trail with 3,476 m of ascent.

Trail Running Shoes 52 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 67 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 3,476 m of ascent to walk up.
GPS Watches Battery life first — a 67 km day outlasts most full-GPS modes.