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View all ↓Triathlon in Ontario 2025 - 2026
The most comprehensive list of Ontario Triathlon Events in 2025 - 2026. Discover 100's of US Ontario Triathlon. Find your perfect race here!
Triathlon Ontario 2025 - 2026
Subaru Triathlon Series - Milton
Milton, ON
01 Jun 25
Free - $198.32
Gravenhurst - Sat June 7 and Sun Jun 8
Gravenhurst, ON
07 Jun 25
Free - $203.54
LPC Guelph Triathlon Clinic
Guelph, ON
08 Jun 25
$56.20
TRi KiDS Triathlon Series BURLINGTON, ON
Burlington, ON
08 Jun 25
Subaru Triathlon Series - Guelph Lake 1
Guelph, ON
14 Jun 25
Free - $209.21
Rose City (Welland) - Sat June 21 and Sun June 22
Welland, ON
21 Jun 25
Free - $176.62
Lil’ Bones Triathlon
Brantford, ON
22 Jun 25
$77.77
2025 - The PureKids Triathlon Series, Powered by Subway
Leamington, ON
29 Jun 25
$66.98
Bracebridge - Sat July 12 and Sun July 13
Bracebridge, ON
12 Jul 25
Free - $176.62
PureKids Triathlon Series Powered by Subway
Windsor, ON
13 Jul 25
$56.20
Bluewater Triathlon and Duathlon - 2025
Sarnia, ON
19 Jul 25
Lakeshore Women's Triathlon
Port Elgin, ON
19 Jul 25
$93.96 - $110.15
Subaru Triathlon Series - Owen Sound
Owen Sound, ON
20 Jul 25
Free - $209.21
K-Town (Kingston) - Sun July 20
Kingston, ON
20 Jul 25
Free - $204.61
Ironkid Triathlon 2025
Sarnia, ON
20 Jul 25
Cornwall Multisport Club - Open Water Swim 2025
Cornwall, ON
25 Jul 25
$10.00
Toronto Triathlon Festival
Toronto, ON
27 Jul 25
Subaru Triathlon Series - Niagara
Grimsby, ON
09 Aug 25
Free - $187.42
Barrie - Sat Aug 9 and Sun Aug 10
Barrie, ON
09 Aug 25
Free - $165.85
Beaton Classic 2025
Greater Sudbury, ON
10 Aug 25
$18.44 - $131.73
Toronto Island - Sat Aug 16 and Sun Aug 17
Toronto, ON
16 Aug 25
Free - $165.85
TRi KiDS Triathlon Series NIAGARA (PORT COLBORNE), ON
Port Colborne, ON
17 Aug 25
2025 Petawawa Triathlon
Petawawa, ON
17 Aug 25
$78.50 - $198.32
Wasaga Beach - Sat Aug 23
Wasaga Beach, ON
23 Aug 25
Free - $176.62
2025 Cornwall Youth Triathlon
Cornwall, ON
23 Aug 25
$35.00 - $45.00
2025 Cornwall Triathlon - Adult Day
Cornwall, ON
24 Aug 25
$35.00 - $600.00
Subaru Women's Triathlon Festival
Grimsby, ON
24 Aug 25
Free - $165.64
Subaru Triathlon Series - Guelph Lake 2
Guelph, ON
30 Aug 25
Free - $187.42
TRi KiDS Triathlon Series MILTON, ON
Milton, ON
31 Aug 25
Lakeside - Sat Sept 6 and Sun Sept 7
Lakeside, ON
06 Sep 25
Free - $183.08
Apex ONEWAY
Greater Sudbury, ON
07 Sep 25
$20.00 - $56.71
Cornwall Multisport Club - Fall Duathlon 2025
Long Sault, ON
13 Sep 25
Free
Barrelman Niagara Falls
Welland, ON
14 Sep 25
Free - $492.41
Showing 1-33 of 33 results