Time and Place Sulphur Springs is organized by the Burlington Runners Club and is held late May in the Dundas Valley Conservation Area, Ancaster, Ontario. Distances Moderate to Ultramarathon: 10 km; 25 km; 50 km; 50 miles; 100 km; 100 miles; 100 mile relay Note: 2017 had a 200-mile option but was added specifically to commemorate its 25th anniversary. To my knowledge,... Continue Reading →