Thousand Islands Triathlon & Runs

Thousand Islands Triathlon & Runs unfolds in Brockville, Ontario, at Centeen Park, offering multiple distances for both triathletes and runners. The flagship Olympic Triathlon features 1500 m swim, 40 km bike, and 10 km run, with additional events including a Sprint Tri, Sprint Duathlon, 10K and 5K runs, and a Try-a-Tri for 16+. A highlight is running through Brockville’s historic 500‑meter railway tunnel, featuring music and lights for a unique course feature.

The event touts fast transitions and a run-focused vibe, plus organizer-provided perks: timing, on-course nutrition, race bib, swim cap, virtual bike fit, photography, snacks, and podium prizes. Charity: The Sobriety House. Visit the organization's website for the most recent information.