Stonetown Triathlon
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Stonetown Triathlon - St. Marys
Stonetown Triathlon takes place at St. Marys Quarry, 425 Water St S, St. Marys, ON, on Sunday, July 5, 2026. The event runs age-group waves across several race formats and distances.
Races include swim, bike and run legs with distances set by age category and draft legal status. Swimming is held in the quarry, described as one of Canada’s oldest. Participants must hold a 2025 Triathlon Ontario membership or purchase a one-day Triathlon Ontario membership.
Entry fees are listed as $65 to $85. A tentative schedule of waves is published and may change depending on registration numbers.
Distances:
- Draft Legal Junior Cup 16-19: Swim 600 m, Bike 16 km, Run 5 km
- Draft Legal Youth Cup 14-15: Swim 400 m, Bike 12 km, Run 3.75 km
- Non-Draft Legal 14-15: Swim 300 m, Bike 8 km, Run 2.5 km
- Non-Draft Legal Youth Cup 12-13: Swim 300 m, Bike 8 km, Run 2.5 km
- Non-Draft Legal 12-13: Swim 300 m, Bike 8 km, Run 2.5 km
- Non-Draft Legal 10-11: Swim 100 m, Bike 4 km, Run 1.25 km
- Non-Draft Legal 8-9: Swim 100 m, Bike 4 km, Run 1.25 km
- Adult Try-A-Triathlon: Swim 300 m, Bike 8 km, Run 2.5 km
Draft legal certification is required for events marked as such. Volunteers are requested, and high school volunteers may use the event to complete volunteer hours. Visit the organization's website for the most recent information.
