日本山岳耐久レース（ハセツネCUP） takes place on Sun, Oct 11, 2026 in Itsukaichi, Japan. The main route is 71.5 km.
- Date
- Sun, Oct 11, 2026
- Start
- Itsukaichi 🇯🇵
- Distance
- 71.5 km
- Level
- Open to all
A prestigious 71.5 km trail running race traversing the Okutama mountainous area in Tokyo, featuring demanding ridges and significant elevation changes.
Official event pageWhat this race demands
This 71.5 km trail running race traversing the Okutama mountainous area demands sustained physical endurance across technical ridges and significant elevation changes.
Extended Distance
Covering 71.5 km requires deep aerobic capacity and rigorous pacing strategies to sustain forward motion over many hours.
Technical Terrain
Traversing demanding mountain ridges places high neuromuscular demands on the lower body for stability, climbing, and descending.
Given the likely duration well exceeding 2.5 hours, athletes should consume 60 to 90 grams of carbohydrates per hour to maintain energy output.
Your road to race day
Race day at 日本山岳耐久レース（ハセツネCUP） is 7 weeks away. This is how a coach divides that time. The first phase starts now.
01Build1 week · Aug 24, 2026 – Aug 30, 2026
Progressive overload: training load climbs in waves, with harder weeks stacked on the base and planned recovery weeks that let the gains land.
02Peak3 weeks · Aug 31, 2026 – Sep 20, 2026
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
03Taper2 weeks · Sep 21, 2026 – Oct 4, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
04Race week1 week · Oct 5, 2026 – Oct 11, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.
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