Half-Marathon and Trail Running, Nozawa Onsen, 2021 The village and mountains of Nozawa Onsen and its surrounds provide a beautiful backdrop for increasingly popular running events. The main two are July’s 4100D trail running event and the Kita Shinshu Half Marathon in September. Along the village streets and mountain trails of this traditional Japanese village, the 4100D is a truly unique experience. So too, the Kita Shinshu half marathon, stretching along the Chikuma River from Nozawa Onsen to Iiyama city. Details for running events in Nozawa Onsen this Green Season; 4100D Nozawa Onsen 2021 – Friday, 23rd July – Categories; 65 km, 23km, 14 km – Entry; 65 km (17,000 yen), 23 km (8,000 yen), 14 km trail race (6,000 […]