When
May 23, 2026
Starts at 6:00am EDT
Weather
TBD
Forecast unavailable; check back shortly.
Registration
Registration Closed
Website
Official website →
Event Details
The race uses a looping course that traverses over 500m/1500ft of elevation gain per 20K loop. Nestled in the town of Ancaster, Ontario, the Dundas Valley is home to a beautiful old Carolinian forest, complete with a (mostly) double track trail network that will challenge you and reward you at the same time. Don't dare miss this event, it is Canada's oldest Ultra trail event, and is also Ontario's only WSER 100 Qualifier!
Event type
Ultra
Distance
160.1 km
Surface
Trail
Registration opens
October 15, 2025 · 9:00 AM EDT, Until Full
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