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 13 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!
September 2026
Camp Tri on September 12, 2026 at Woodlands Beach offers swim bike and run races with on site camping, professional timing and scenic St Lawrence courses.
A multi-race weekend at Lakeside Resort on Lake Sunova offering swim, bike and run courses for adults and children.
Teams of two race up to six hours on the Canadian Shield near Parry Sound, choosing among 28 checkpoints in a points-based multi-sport format.
A multisport adventure race in Glenburnie with a 7 to 9 km mixed trail lap and a four hour format for solo or team entries.
Barrelman Niagara Falls on September 20, 2026 offers two triathlon distances, including a 2000 m swim, 90 km bike and 21.1 km run.
Monthly updates for Ontario
Get new running races (and updates) in your inbox every month.
October 2026
Cornwall Multisport Club Fall Duathlon on Saturday October 3 2026 offers Double Du, Long Course and Short Course options with the club organizing the event.
January 2027
A winter multisport race in Ottawa combining 8 km skating on the Rideau Canal, a 5 km run and a 6 km cross country ski as part of Winterlude.
May 2027
A multisport event on May 22, 2027 at Carleton University featuring indoor-pool swims, closed-road bike and run courses and multiple triathlon and duathlon distances.
July 2027
K-Town Tri is a historic multisport race on CFB Kingston offering sprint, Olympic, enduro and duathlon formats with calm swims and a scenic bike toward Gananoque.
A mid-summer IRONMAN 70.3 in Huntsville, Ontario featuring a Peninsula Lake swim, a rolling hilly bike through Muskoka, and a run on wooded trails.
Urban triathlon in downtown Toronto on July 25, 2027 with Sprint and Olympic distances and individual or relay options.
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 triathlon in Ottawa featuring a river swim, a rolling bike course through city and rural roads, and a downtown run finishing by Major’s Hill Park.