Half Marathon races near Nagano

Nagano Training Notes

Nagano hosts 3 Half Marathon races in 2026 within 80 km of the city centre — upcoming dates, recurring series, and other races nearby, all in one place.

Locals run Nagano like a mountain-adjacent base camp. The route covers 52 km and gains 130 m. You can push it to a 65 km day with 1,709 m of gain. RETO Running Club uses GMO Athletes Park Yunomaru for hard intervals at 1,750 m. GMO Athletes Park Yunomaru can make you feel that slight shortness of breath fast. Nobeyama Ultramarathon, Karuizawa Half Marathon, Nagano Marathon, and 4100D Mountain Trail sit as the anchor events.

Locals ride the river when they want clean Z2 and easy base miles. The route runs 5 km and connects Nagano, Chikuma, and Ueda. Lake Nojiri gives riders a 20 km loop when the legs want rhythm. 3 km. Japan Alps Cycling Road is the name people point at when the day needs bigger scenery. Azumino Century Ride is the anchor event for a gran fondo mood. The Hakuba mountains hold the MTB side, with singletrack, downhill lines, and enough climbing to skip fake suffering.

April, May, July, August, October, and November usually give the best training windows. Hakuba keeps summer honest when Nagano city feels hot, and temperatures around 30°C can still come with a refreshing valley breeze. Hakuba 47 Mountain Sports Park MTB runs from mid-July to late August. Hakuba Iwatake MTB Park runs from July to late August, then returns from end of September to early November. Winter changes the whole game. Roads stay compact most of the way, but slick ice and deeper snow make runners watch each step and cyclists choose routes carefully.