okushinano100.com

Okushinano 100 Trail Running Race

location_on

Shinano, Niigata, Japan

calendar_today 05 Jun, 2026

About the Event

Embark on "The Timeless Trail" at the Okushinano 100, a journey through 100 years of history in Japan's deep snow country on June 6-8, 2025. This is more than an ultramarathon; it's a pilgrimage through primeval beech forests over 300 years old, across historic village trails, and past serene orchards in the heart of Nagano. The 100km course is a meticulously crafted tour of Oku-Shinano's most captivating landscapes, demanding respect and rewarding with unparalleled tranquility. With a deep commitment to sustainability and mountain etiquette, this event offers a rare, contemplative ultrarunning experience that connects you to the ancient soul of rural Japan.

Races Offered

100 km

Jun 05, 2026

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Distance — 100K

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15 days remaining

25 km

Jun 05, 2026

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Distance — 25K

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15 days remaining

50 km

Jun 05, 2026

straighten

Distance — 50K

terrain

Type — —

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15 days remaining

Weather History

These values represent the 3-year monthly averages for June in Shinano.

thermostat Temperature

14.1° / 23.3°

wb_sunny Feels like

14.1° / 23.8°

light_mode Avg sunshine hours

9h 5m

water_drop Avg rainfall

6.8 mm

ac_unit Avg snowfall

—

air Avg wind speed

5.9 km/h (Light breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Very High (8.0)

humidity_mid Humidity

80.6%

wb_twilight Sunrise

04:28

nightlight Sunset

19:06

About Shinano

Learn more about the host city, Shinano.

Shinano may refer to:Shinano, Nagano, a town in Nagano prefecture, Japan Shinano River, the longest river in Japan Shinano Province, one of the old provinces of Japan Japanese aircraft carrier Shinano, an aircraft carrier of the Imperial Japanese Navy Shinano (train) named after the province of old Japan Shinano Maru (1900), armed merchantman of the Battle of Tsushima Shinano Kenshi