100 mi
100 Mile
Sat, May 29 · 6:15 AM
100 MI
- 100 Mile
- 50 Mile / 100K
- 50K
- Relay/Time
- Trail
Sulphur Springs Trail Race 2027
- Dundas Valley Conservation Area, Ancaster, ON
About Sulphur Springs Trail Race 2027
Sulphur Springs Trail Race returns to the Dundas Valley area on May 29–30, 2027. The current 2027 registration listing names 10K, 20K, 50K, 50 Mile, 100K, 100 Mile, 50 Mile Night Relay, and 100 Mile Team Relay options.
Pick your distance
100 mi
100 Mile Team Relay
RelaySat, May 29 · 9:00 AM
100K
100K
Sat, May 29 · 6:00 AM
50 mi
50 Mile
Sat, May 29 · 9:00 AM
50 mi
50 Mile Night Relay
RelaySat, May 29 · 9:00 AM
50K
50K
Sat, May 29 · 9:00 AM
20K
20K
Sun, May 30 · 9:00 AM
10K
10K
Sun, May 30 · 9:00 AM
Prices from the organizer; registration is on ultrasignup.com. Please check the official website for up-to-date times and pricing.
Highlights
May 29–30, 2027 in Ancaster, Ontario
10K, 20K, 50K, 50 Mile, 100K, and 100 Mile options
50 Mile Night Relay and 100 Mile Team Relay
Registration listing gives 108 Martin Road as the address
Registration opens October 15, 2026
Course
- Surface
- Trail
- Venue
- Dundas Valley Conservation Area
- Address
- 108 Martin Road, Ancaster, ON, Canada
- Location
- Ancaster, ON
Course details
The current 2027 registration listing describes 10K and 20K loops through Dundas Valley, with longer distances built from repeated loops. It lists Saturday starts for the ultra distances and relays, plus Sunday starts for 10K and 20K.
Things to know
Race weekend
Events run Sat, May 29 to Sun, May 30, 2027. Check each distance for its day and start time.
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Other editions
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Listing freshness
The Running Directory combines organizer-provided details, official race links, and ongoing listing research. Always confirm final dates, prices, times, and course details with the race organizer before registering.
Last updated: September 26, 2026
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Sulphur Springs Trail Race 2027