Thousand Islands Triathlon & Runs
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Thousand Islands Triathlon & Runs : Brockville, August 9, 2026
The event takes place at Centeen Park in Brockville on Sunday, August 9, 2026. Multiple race formats are offered, including triathlon, duathlon and road runs across a range of distances.
Race options include:
- Olympic Triathlon: Swim 1500m, Bike 40km, Run 10km
- Olympic Swim Cycle: Swim 1500m, Bike 40km
- Sprint Triathlon: Swim 750m, Bike 20km, Run 5km
- Sprint Duathlon: Run 5km, Bike 20km, Run 2.5km
- Try a Tri (16+): Swim 200m, Bike 20km, Run 2.5km
- 10K Run and 5K Run
The run course includes the event's historic railway tunnel section of about 500 meters with music, lights and shade. The bike course is open to traffic; participants must follow the rules of the road. The event has an age minimum of 16 for courses that use open roads.
Included with registration are a personalized race bib, a swim cap, a free virtual bike fit, professional timing, on-course nutrition, race photography and post-race snacks. Podium prizes are awarded to the top three male, female and non-binary finishers in each event. Medal and shirt deadlines are set for July 11 and July 3 respectively, and online registration is available until August 6 at 6:00 pm if not sold out.
Bib pickup is scheduled Saturday, August 8 from 3:00 pm to 6:00 pm at Centeen Park with in-person orientations at 4:00 pm and 5:00 pm, and on Sunday, August 9 starting at 7:00 am. Refunds are available only with purchased cancellation insurance. Visit the organization's website for the most recent information.
