

About the event
The Sulphur Springs Ultra 100 Mile, held on May 24, 2025, is a monumental test for ultra-runners, featuring 3,920 meters of elevation across an eight-loop course. Organized by the Burlington Runners Club, this event is set within Ontario's scenic Dundas Valley Conservation Area, known for its rolling trails and technical climbs. Runners have 30 hours to complete this feat, which offers UTMB points and the chance to qualify for the Western States Endurance Run. This course combines a breathtaking natural backdrop with the support of dedicated aid stations, ensuring a memorable and rewarding challenge.
Date:
Sat
May 24
2025
Location:
Distance:
Elevation profile:
Hilly
Website:
LinkElevation gain:
Number of participants:
Other distances for this race
Sulphur Springs Trail Race Ultra 100 Mile
Sulphur Springs Trail Race Ultra 100 Mile
Sulphur Springs Trail Race Ultra 100 Mile
Sulphur Springs Trail Race Ultra 100 Mile
Sulphur Springs Trail Race Ultra 100 Mile
Sulphur Springs Trail Race Ultra 100 Mile
Sulphur Springs Trail Race Ultra 100 Mile
Sulphur Springs Trail Race Ultra 100 Mile
Find the best training plan for your goals and the distance you’re planning to run:
Stories from Runnas
Take your running to the next level
Taking on the Sulphur Springs 100 Mile is an endurance journey through the rugged beauty of Dundas Valley Conservation Area. This eight-lap challenge, with an elevation gain of 3,920 meters, allows participants to qualify for the prestigious Western States Endurance Run, making it a race to remember on May 24, 2025.
If you are an official race organiser with any questions about this page, please get in touch: races@runna.com
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