Ontario
Triathlon Calendar Ontario 2026-2027
Monthly updates for Ontario
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in Ontario for 2026-2027! Our updated list features 23 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!
July 2027
A mid-summer IRONMAN 70.3 in Huntsville, Ontario featuring a swim in Peninsula Lake, a rolling and challenging bike course, and a run on wooded trails.
Triathlon at Exhibition Place in Toronto on July 25, 2027 offering Olympic and Sprint formats with individual, relay and corporate challenge entry options.
August 2027
Swim along the St. Lawrence waterfront and run through Brockville’s 500 m railway tunnel with music and lights, plus races from 5K to Olympic triathlon.
Monthly updates for Ontario
Get new running races (and updates) in your inbox every month.