Best Olympic-distance triathlons in Canada
7 rated races, ranked by an overall score built from racer reviews and race reports. How we rate
7 races
By the numbers
Overall score 3.8Very good#17 of 164Moderate evidence · 6 sources
Water 16–22 °C (61–72 °F)
1. Toronto Triathlon Festival (Supertri Toronto)
Overall score 3.8Very goodModerate evidence · 6 sourcesTop 10%#17 of 164 overallToronto, Canada · Next race 25 Jul 2027
Racers loveBike on fully closed Gardiner Expressway and Don Valley Parkway, 2 a.m. to noon.
Watch outLake Ontario was about 16 °C (61 °F) in 2015 and felt cold to 2018 and 2019 racers.
“epic race in the heart of downtown” Sean Chin blog
- Water
- 16–22 °C (61–72 °F)
- Air
- 18–28 °C (64–82 °F)
- Field
- about 1,750
- Best
- Bike 4.6
- Weakest
- Run 3.2
Overall score 3.6Very good#50 of 164Moderate evidence · 4 sources
Water 20 °C (68 °F)
2. Rose City Triathlon
Overall score 3.6Very goodModerate evidence · 4 sourcesTop 28%#50 of 164 overallWelland, Canada · Last race 28 Jun 2026
Racers loveCalm rowing basin swim with bottom cables and no waves; water was 20 °C (68 °F) in 2016.
Watch outThe flat bike has headwind stretches, and a 2016 report called it windy.
“This water is just amazing, it's almost like a pool” Welland Tribune staff, Welland Tribune (via PressReader)
- Water
- 20 °C (68 °F)
- Air
- 15–28 °C (59–82 °F)
- Field
- about 1,000
- Best
- Swim 4.8
- Weakest
- Run 2.9
Overall score 3.5Very good#55 of 164Moderate evidence · 5 sources
Water 16–19 °C (61–66 °F)
3. Vancouver Triathlon
Overall score 3.5Very goodModerate evidence · 5 sourcesTop 32%#55 of 164 overallVancouver, Canada · Last race 7 Sep 2026
1.5 / 37.6 / 10 kmRacers loveSea swim from Second Beach, with paddleboard lifeguards, boats and kayaks on patrol
Watch outSea is 16 to 19 °C (61 to 66 °F). Wetsuits are mandatory at 15.9 °C (60.6 °F) or below.
“grassroots, nice and mellow race” Dan Falloon, Pique Newsmagazine: Martin, Hopkins top…
- Water
- 16–19 °C (61–66 °F)
- Air
- 16–23 °C (61–73 °F)
- Field
- about 930
- Best
- Bike 4.6
- Weakest
- Race 3.1
- Overall score 3.5Very good#65 of 164
Moderate evidence · 5 sources
Water 21–22 °C (70–72 °F)
4. Cornwall Triathlon
Overall score 3.5Very goodModerate evidence · 5 sourcesTop 40%#65 of 164 overallCornwall, Canada · Last race 23 Aug 2026
Racers loveBike is on closed city streets, and the run follows a riverside path.
Watch outBike is 10 km (6.2 mi) loops with turns and a no-passing zone; the Olympic repeats it four times.
“I thought it was a well-run event.” Cornwall Seaway News
- Water
- 21–22 °C (70–72 °F)
- Air
- 15–26 °C (59–79 °F)
- Field
- about 500
- Best
- Bike 4.2
- Weakest
- Race 3.1
Overall score 3.1Good#128 of 164Moderate evidence · 4 sources
Water 16–19 °C (61–66 °F)
5. Triathlon 5150 Mont-Tremblant (Olympic)
Overall score 3.1GoodModerate evidence · 4 sourcesBottom 23%#128 of 164 overallMont-Tremblant, Canada · IRONMAN · Last race 20 Jun 2026
Racers loveWetsuit-legal lake swim at about 17 to 18 °C (63 to 64 °F) in race week.
Watch outBike climbs Duplessis twice, about 600 m (1,970 ft) in total by one forum estimate.
“a bit more than half an Alpe d'Huez” devashish_paul and others, Slowtwitch forum (Tremblant 70.3 / 5150 thread)
- Water
- 16–19 °C (61–66 °F)
- Air
- 12–27 °C (54–81 °F)
- Bike climb
- 600 m (1,970 ft)
- Field
- about 1,800
- Best
- Conditions 4.1
- Weakest
- Race 2.8
Overall score 3.0Good#142 of 164Moderate evidence · 5 sources
6. Subaru Guelph Lake Triathlon (Guelph Lake 1 and 2)
Overall score 3.0GoodModerate evidence · 5 sourcesBottom 15%#142 of 164 overallGuelph, Canada · Last race 21 Jun 2026
1.5 / 36 / 10 kmRacers loveSprint swim is one beach-start loop with interval waves to spread the field.
Watch outA rider was hit by a driver on the 2018 bike course; current closure status is not stated.
“Expect a fairly long run across grass.” Triathlon Magazine Canada (Guelph Lake 1…
- Air
- 12–26 °C (54–79 °F)
- Field
- about 1,400
- Best
- Stay and travel 4.0
- Weakest
- Run 2.9
Overall score 3.0Good#147 of 164Thin evidence · 3 sources
7. Thousand Islands Triathlon & Runs
Overall score 3.0GoodThin evidence · 3 sources#147 of 164 overallBrockville, Canada · Next race 1 Aug 2027
Racers loveRun goes through a 500 m (0.31 mi) railway tunnel with lights and music, then finishes on Water Street.
Watch outBike is on open roads; light Sunday traffic is not the same as closed roads.
“The out-and-back bike course is not closed, but traffic is light.” Triathlon Magazine Canada (course write-up)
- Air
- 16–27 °C (61–81 °F)
- Best
- Run 3.9
- Weakest
- Bike 2.1
About these ratings
Races are ranked by an overall score out of 5, built from racer reviews and race reports, on the race itself, swim, bike, run, conditions and travel. 5 is always the better end. How we rate
Olympic course: 1.5 km (0.9 mi) swim, 40 km (24.9 mi) bike, 10 km (6.2 mi) run.
Reports on Olympic-distance races are scarcer, so 1 of 8 scores are thin evidence: fewer than 4 sources each (dashed score, marked provisional). Show only races with 4+ sources. 2 of these races set their own distances, and each race page lists the real course.
1 race is paused or discontinued and hidden until you turn off “Active races only” in All filters.
37 racer reviews and race reports.
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