Course
100km100 km
50km50 km
Key dates
- ★Race dayJune 2027 · date to be announced
Provisional date, projected from last year — the organiser has not announced this edition yet. We show the month only.
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Save Saroma Lake 100km 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 Saroma Lake 100km Ultramarathon to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
More races in Hokkaido All ›
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Coastal course past Hakodate's Red Brick Warehouse district
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Hokkaido Marathon
A marathon through Hokkaido forests and northern Japan coastlines
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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.