Course
100 Mile99.4 mi
100K100 km
Key dates
- ★Race dayJuly 2027 · date to be announced
Provisional date, projected from last year — the organiser has not announced this edition yet. We show the month only.
About
The OSJ Ontake 100 is a trail race through the mountains around Mount Ontake in Nagano, Japan, with 100-mile and 100-kilometer distances. The rugged course climbs through forested slopes on one of Japan's most revered sacred peaks.
Your next race, seen from above.
Save OSJ Ontake 100 to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
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Save OSJ Ontake 100 to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
More races in Nagano All ›
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Shinetsu Five Mountains Trail
100 miles over five peaks along the Shin-etsu ridge
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Madarao Forest Trails 50km
Through the forest trails of Mt. Madarao
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A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.