The Sulphur Springs Trail Race is a scenic and challenging ultra marathon held in Hamilton, Ontario, along the Niagara Escarpment. Established in 1992 as Canada's oldest ultra marathon, the event features a 20K loop course with groomed trails, rolling hills, and steep climbs.

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Participants experience over 500m of elevation gain per loop and enjoy natural springs and streams throughout the course. The race serves as a Western States Endurance Run qualifying event and emphasizes sustainability, requiring participants to bring reusable cups or bottles.

* 20K loop course on groomed trails and moderately challenging single tracks * Features rolling hills, steep climbs, descents * Scenic route through the Niagara Escarpment including natural springs and streams

• Over 500m (1,500 feet) of elevation gain per 20K loop
• Western States Endurance Run qualifier
• Cup-free event: participants must bring their own reusable cups or bottles
• No pets or strollers allowed in the event or start/finish area
• Aid stations offer variety but participants should bring specific dietary needs
• Poles permitted for distances 50 miles or longer