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 26 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 multisport race in Ottawa combining 8 km skating on the Rideau Canal, a 5 km run and a 6 km ski leg as part of the Winterlude Festival on January 31, 2027.
May 2027
A multisport event at Carleton University on May 22, 2027 with indoor pool swims, closed-road bike and run courses and multiple triathlon and duathlon distances.
Ontario weekend multi sport adventure race with three course options, teams of 2 or 4, and on site canoe rentals.
June 2027
Two-day triathlon and duathlon at Muskoka Wharf with a steamship jump, lake swims, shared-road bike courses and a hilly run through Gravenhurst.
Races at the Welland International Flatwater Centre with wide swim lanes, fully closed bike courses and spectator friendly run routes.
Monthly updates for Ontario
Get new running races (and updates) in your inbox every month.
July 2027
A multisport day at Kelso Conservation Area on July 4, 2027 featuring swimrun races, open water swims and 7.5 km and 15 km trail runs.
Two days of triathlon and duathlon racing in Bracebridge featuring Olympic, Sprint and Give It A Tri distances, a river swim and shared road bike courses.
Multi-discipline triathlon and duathlon in Bright's Grove on July 17, 2027, with sprint and Olympic distances, aquabike options, and team races.
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 multi discipline event in Huntsville with a swim in Peninsula Lake, a hilly bike through Muskoka and a run on wooded trails; registration is sold out.
SwimRun and open water swim events in Parry Sound Ontario with swims from 2K to 10K and SwimRun races of 12.9K and 25.8K on Georgian Bay and nearby trails.
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.
Multi-day triathlon and duathlon on the Barrie Waterfront with closed-road bike courses, youth Kids of Steel races, finisher medals and timing by Sportstats.
IRONMAN Canada Ottawa on August 8, 2027 features a river swim, a rolling closed bike course through city and rural roads, and a flat downtown run finishing at Major’s Hill Park.
Team adventure race in Northern Ontario on August 14, 2027 with bike, trek and paddle stages, map navigation and 30 canoe rentals available first come first served.
A two day multisport weekend on Toronto Island featuring triathlon and duathlon distances with swim from Centre Island Beach, bike loops to Hanlan’s Point, and ferry access required.
A multisport day at Area 8 Conservation Area on August 15, 2027 with 10K and 20K swimrun, open water swims, trail runs and an aquathlon of 2.5K, 1K, 2.5K.
Triathlon and duathlon at Riverside Park in Kemptville with a pool swim, closed highway cycling, and a park run that finishes on a paved trail, supporting Rural FASD.
XTERRA Sleeping Giant in Thunder Bay features off road triathlon, duathlon and trail races at Boulevard Lake and Kinsmen Park on Aug 28 and 29, 2027.