160.9 km
100 Mile
Sat, May 29 · 6:15 AM
Trail Race
160.9 km
- 100 Mile
- 50 Mile / 100K
- 50K
- Relays
- Trail
Sulphur Springs Trail Race 2027
- Dundas Valley Conservation Area, Ancaster, ON
Organized by Burlington Runners
Overview
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
160.9 km
100 Mile Team Relay
Sat, May 29 · 9:00 AM
Relay100 km
100K
Sat, May 29 · 6:00 AM
80.5 km
50 Mile
Sat, May 29 · 9:00 AM
80.5 km
50 Mile Night Relay
Sat, May 29 · 9:00 AM
Relay50 km
50K
Sat, May 29 · 9:00 AM
20 km
20K
Sun, May 30 · 9:00 AM
10 km
10K
Sun, May 30 · 9:00 AM
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.
About the organizer
Organizer
Burlington Runners
More races like this
Other editions
Browse nearby and by distance
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.
See something wrong? Report a correction
Details checked October 7, 2026
