Thousand Islands Triathlon & Runs

AUG
9
2026
Swim bike and run in scenic Brockville at Centeen Park, with a one of a kind 500 meter railway tunnel on the run course complete with music and lights. Distances from Try a Tri to Olympic welcome all levels.
Sun 9 Aug 2026
40 kilometers 20 kilometers 10 kilometers 5 kilometers

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Thousand Islands Triathlon & Runs

The event takes place on Sun, Aug 09, 2026 at Centeen Park in Brockville (70 Water St E, Brockville, ON). The run course passes through the oldest railway tunnel in the area; the tunnel is about 500 meters long and features music, lights, and shade. The bike course is open to traffic; participants must follow the rules of the road and the event has a minimum age of 16 for road cycling entry.

Race options and additional details

  • Olympic Triathlon - 1500 m swim, 40 km bike, 10 km run; $110
  • Olympic Swim Cycle - 1500 m swim, 40 km bike; $85
  • Sprint Triathlon - 750 m swim, 20 km bike, 5 km run; $95
  • Sprint Duathlon - 5 km run, 20 km bike, 2.5 km run; $90
  • 10K Run - 10 km; $60
  • 5K Run - 5 km; $50
  • Try a Tri (16+) - 200 m swim, 20 km bike, 2.5 km run; $85

Registration includes a virtual bike fit, a personalized race bib, a Somersault swim cap, professional timing, on-course nutrition, race photography, post-race snacks, and podium prizes for the top three male, female, and non-binary finishers in each event. Shirt, medal, and online registration deadlines are listed; bib pickup is scheduled at Centeen Park on the day before and the day of the event. Refunds are available only if cancellation insurance is purchased. Visit the organization's website for the most recent information.

40 km
Olympic Triathlon (1500 M Swim, 40 Km Bike, 10 Km Run)
20 km
Sprint Triathlon (750 M Swim, 20 Km Bike, 5 Km Run)
10 km
10k Run
5 km
Sprint Duathlon (5 Km Run, 20 Km Bike, 2.5 Km Run)
5 km
5k Run
Try a Tri (16+)
Olympic Swim Cycle (1500 M Swim, 40 Km Bike)

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