Course
100km100 km
60km60 km
Key dates
- ★Race dayOctober 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
Shimanto River Ultramarathon follows Japan's Shimanto River, often called the country's last clear stream, through Kochi Prefecture on the island of Shikoku. Runners can choose the 100km or 60km distance.
Your next race, seen from above.
Save Shimanto River Ultramarathon 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 Shimanto River Ultramarathon 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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Kochi Ryoma Marathon
Named for Kochi's samurai hero, Sakamoto Ryoma
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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.