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 11 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!
October 2026
Duathlon in Ingleside with short, long, double and Olympic formats, team relay options for some races, and no water stations on course.
January 2027
A winter multisport race in Ottawa combining skating on the Rideau Canal, a 5 km run and 6 km cross country skiing, held as part of the Winterlude Festival.
May 2027
Multisport races at Carleton University on May 22 2027 with pool swims, closed road bike and run courses, timed results and podium prizes.
July 2027
Historic triathlon on CFB Kingston offering Sprint, Olympic, Enduro and duathlon courses with a calm 22 to 24°C swim and a scenic bike toward Gananoque.
IRONMAN 70.3 Muskoka in Huntsville, Ontario features a swim in Peninsula Lake, a bike through Muskoka terrain with rolling and hilly sections, and a hilly run on wooded trails.
Monthly updates for Ontario
Get new running races (and updates) in your inbox every month.
Urban triathlon in downtown Toronto on July 25, 2027 offering Olympic and Sprint distances, individual and relay options, plus a Finish Line Festival.
August 2027
Multi-distance triathlon and run events in Brockville on August 1 featuring a 500 m historic railway tunnel, professional timing, and on-course support.
A full IRONMAN in Ottawa with a river swim, rolling bike course through the city and a downtown run finishing at Major’s Hill Park by the Fairmont Château Laurier.
September 2027
A multisport event in Ottawa with triathlon, duathlon and running options on a scenic Rideau Canal course and a finish on Terry Fox Track.
Multiformat swim bike run event at Woodlands Beach with island hopping bike routes, onsite camping and relay options.
Teams of two navigate a points based multi sport adventure on the Canadian Shield near Parry Sound on Sept 12, 2027; registration opens Dec 1, 2026.