Thousand Islands Triathlon & Runs
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Event overview
Thousand Islands Triathlon & Runs takes place in Brockville on Sunday, August 9, 2026, at Centeen Park. The run course includes a 500 m section through an historic railway tunnel that features music, lights, and shade. The bike course is on open roads; participants must follow the rules of the road. The event has an age restriction of 16+ for participants on the bike course.
Race options and distances
- Olympic Triathlon: Swim 1500 m, Bike 40 km, Run 10 km
- Olympic Swim Cycle: Swim 1500 m, Bike 40 km
- Sprint Triathlon: Swim 750 m, Bike 20 km, Run 5 km
- Sprint Duathlon: Run 5 km, Bike 20 km, Run 2.5 km
- Try a Tri (16+): Swim 200 m, Bike 20 km, Run 2.5 km
- 10K Run: Run 10 km
- 5K Run: Run 5 km
Services, deadlines and logistics
Registration includes professional timing, a personalised race bib, a swim cap, a free virtual bike fit, on-course nutrition, race photography, food and drinks (vendor), post-race snacks, and podium prizes for the top three male, female, and non-binary finishers in each event. Finisher medals are an optional add-on. Important deadlines: shirt order by July 3, medal add-on by July 11, and online registration closes August 6 (subject to sell-out). Bib pickup is scheduled the day before the event and on race day. Refunds are available only if cancellation insurance is purchased. Strava route files are provided for swim, bike, and run courses. Visit the organization's website for the most recent information.