This unbelievable 20K looped course is a hidden gem inside the Dundas Valley Conservation Area of Ancaster, Ontario. With wildlife teeming through this old Carolinian Forest, and waterfalls cascading over rocks along the course, your legs may not even notice traversing the over 500m / 1500 feet of elevation per 20K loop. Expect to be challenged on this (mostly) double track trail as you are supported with 4 fully stocked Aid Stations along the way. The Sulphur Springs Trail Race 100K and 100 Mile events are now Western States Endurance Run Qualifying Races. The organizers are proud to be the newest in Canada and the first race in Ontario to serve as a WSER 100 Qualifier.