Course
A 170 km (100-mile) mountain traverse with about 10,500 m of climbing, starting at Yunoyama Onsen in Komono, Mie Prefecture and finishing at the Carmel Beach Club on the Otsu lakefront. The route crosses the Suzuka, Konan Alps, Hiei and Hira ranges through three prefectures. Marking is deliberately sparse and runners must navigate with a GPS device.
Key dates
- ✓Entries openedThu 1 May 2025
- ✓Entries closedWed 10 Jun 2026
- ★Race dayFri 30 Oct 2026
About
Lake Biwa 100 is an extreme mountain ultramarathon traversing the technical and beautiful ridgelines of the Suzuka and Hira mountain ranges. The race challenges runners with a demanding 100-mile course that requires not just running ability, but comprehensive mountain traversal skills and risk management. Participants will experience breathtaking landscapes around Lake Biwa while facing one of the most challenging mountain ultramarathons in Japan.
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Mt. Hiei International Trail Run
On the sacred mountain of Japan's 'marathon monks'
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