Course
100 Mile100 mi
100K100 km
50 Mile50 mi
50K50 km
10K10 km
Key dates
- ★Race dayMay 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 Sulphur Springs Trail Race runs through the forested trails of the Dundas Valley Conservation Area near Ancaster, Ontario. Distances range from 10K up to 100 miles, making it one of Ontario's most established ultra weekends.
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Save Sulphur Springs Trail Race 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 Sulphur Springs Trail Race 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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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.