第12回 FunTrails Round 秩父＆奥武蔵100MILE/100K/50K 2026

The FunTrails Round Chichibu & Okumusashi trail running series is held at Hitsujiyama Park in Chichibu, Saitama Prefecture, near Seibu-Chichibu Station. The event features three distances: FTR100MILE, FTR100K, and 50K, positioning it as a long-distance trail race rather than a short mountain run. The course is a loop beginning and ending at Hitsujiyama Park, leading runners through the steep, rolling trails of Chichibu and Okumusashi. It passes temples and shrines, including specific Okumusashi locations like Konogongen, Kan Hasshu Miharasadai, Takayamafudo, and Kenmin no Mori. Professional trail runner Shunsuke Okumiya directs the race, which is defined by its challenging climbs, local religious sites, and participation from Kanto-region trail runners.