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 14 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!
January 2027
A winter triathlon in Ottawa on January 31 2027 combining skating on the Rideau Canal, a 5K run and cross country skiing at Mooney's Bay.
May 2027
Multisport event in Ottawa with indoor pool swims, closed-road bike and run courses, multiple triathlon and duathlon distances at Carleton University on May 22, 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.
A triathlon in Huntsville, Ontario featuring a lake swim, a hilly bike course known as The Beauty and the Beast, and a run on wooded trails; registration sold out.
Monthly updates for Ontario
Get new running races (and updates) in your inbox every month.
A multisport event in Parry Sound offering swimrun distances to 25.8 km plus 2 km to 10 km open water swims and 5 km and 10 km trail runs.
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
A multi-format triathlon and running event in Brockville featuring a 500 m tunnel on the run course, timed results, on-course nutrition, and prizes across several race distances.
IRONMAN Canada-Ottawa stages a river swim, a rolling closed bike course through city and rural roads, and a downtown run that finishes by the Fairmont Château Laurier and Parliament.
A multisport weekend at Area 8 Conservation Area with 10K and 20K swimrun races, open-water swims, trail runs, and a new 2.5K-1K-2.5K aquathlon.
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.
Camp Tri at Mille Roches Beach features swim, bike and run events with island bike routes, professional timing and on-course support.
A multi-sport adventure race near Parry Sound ON for teams of two, with a points-based course, a mandatory prologue and a six hour time limit to visit up to 28 checkpoints.