The Complete List of Triathlons In Ontario 2024

The races are scheduled and planning is underway. All you need to do is train. Here is a list of the triathlons in Ontario in 2024.

There is no one type of triathlon. Just like there’s no one kind of triathlete. Triathlon Ontario supports the development of safe and fair multisport in Ontario.

Below you’ll find a comprehensive list of Ontario triathlons that span the province and the 2024 outdoor race season. There’s bound to be an event that will fit into your schedule. As for your interest and ability, almost all the races below are more properly called events, bringing together a collection of different categories and distances and classes. 


3 Winterlude Triathlon, Ottawa, ON

Nicknamed "the most Canadian event around," the Winterlude Triathlon has been running since 1984 as part of the annual Winterlude Festival. A unique twist—the disciplines include skating, running and cross-country skiing.


9 - Ontario Indoor Triathlon, Scarborough, ON

This indoor triathlon is a fun and inexpensive way to try the spot. All you need is your clothing and shoes. The run portion is on an indoor track, the swim is in a pool and the bike portion is on a stationary bike. Registration is open to anyone 12 years of age and up.


18 - Early Bird Triathlon, Ottawa, ON 

This family-friendly season warm-up is held at Carleton University and features a closed biking course and a cozy pool swim (widely considered to be preferable than a fresh dip in a lake in mid-May). Choose from a list of triathlon and duathlon events.

26 - C3 Royal Containers Benson Steel Kids of Steel & Adult Pool Triathlon, Caledon, ON

This event has been running for over 20 years and is a chance for the entire family (from ages three to 80) to compete. 


2 - Subaru Milton Triathlon, Milton, ON 

Based out of Kelso Conservation Area in Milton, this is the Subaru series’ first race of the season. A variety of races are available: Try-A-Tri, Sprint Triathlon, along with a Duathlon. The crux of the course is the “6th Line hill” and the highlight is the scenic running course, which follows both road and cross-country trails.

8-9 - MultiSport Canada Gravenhurst Triathlon, Gravenhurst, ON 

Set in the heart of cottage country, this is a full weekend of racing, with something for everyone. Racers start their swim from the Muskoka Steamboats. The race weekend gives athletes an opportunity to race in the Sprint and Olympic distance triathlons, as well as Sprint and International Duathlons. 

15-16 - Subaru Triathlon Series - Guelph Lake I , Guelph, ON 

The Subaru Guelph Lake One Triathlon weekend is one of Ontario’s most popular and longest-running races. There are a wide variety of races and distances to choose from for athletes of all abilities and levels of experience, including Try-a-Tri, Sprint, and standard distance triathlons and duathlons.

22-23 - Rose City Triathlon, Welland, ON 

The Welland International Flatwater Centre is one of the most exciting swim courses Ontario has to offer. The canal swim course is a 2,000-metre single-loop, clockwise swim with great viewing for spectators. Calm waters and a roaring crowd will greet racers as they exit the swim and run directly up the Grandstands into the transition area. The closed bike course is flat and fast. The long course runs on Saturday and the Sprint course on Sunday.

23 - The TriMuskokan Short Course Triathlon and Try-a-Tri, Huntsville, ON  

This homegrown grassroots race is an incredible community event that focuses on a great experience for everyone—first-timers and seasoned triathletes alike. It offers relay events, bike/run duathlons, and a swim/bike event.

29-30 - North Bay Triathlon Weekend, North Bay, ON

A true community event showing off North Bay’s hospitality. All three of the triathlon's events meet the highest standard and are sanctioned by Triathlon Ontario. The weekend starts off with 200 kids participating in the a non-competitive event run through the Birchhaven neighbourhood. On day two there is the North Bay Try-a-Tri event for those for those who are less experienced triathletes and want to “Try a Triathlon.”

TBD - Lakefield Triathlon, Lakefield, ON

The Lakefield Triathlon is a Triathlon Ontario sanctioned event hosted by the Peterborough Pirates Triathlon Club. Situated on the beautiful campus of Lakefield College School, this triathlon is meant to be a fun, fair and safe learning experience for athletes of all abilities aged four to 19 years of age.


6-7 - MultiSport Canada Bracebridge Triathlon, Bracebridge, ON 

From beginners to experienced athletes, there’s something for everyone at this full weekend of events in the heart of cottage country. Events ranging from Sprint Triathlon/Duathlon and Give-it-a-Tri to Olympic Triathlon/Duathlon give everyone an opportunity to participate.

7 - Subaru Ironman 70.3 Muskoka, Huntsville, ON 

This midsummer race is loved for its stunning beauty and naturally tough course (as if Ironman courses weren’t tough enough). 

14 - Toronto Triathlon Festival, Toronto, ON

The welcoming TFF serves athletes of all capabilities, offering both Sprint and Olympic distance races (and relay options). The courses will take you on memorable journeys through Toronto’s unique landscape, as concrete jungles give way to picturesque hills and valleys. Designed to welcome Olympians, weekend warriors, and those looking to add a challenging event to their bucket list.

14 - Kids in Triathlon - Mississauga, Mississauga, ON

This triathlon is part of the Kids In Triathlon (KITCan) Series. A non-competitive race series for kids aged three to 11 years old. It's a family-friendly environment, motivating kids to get fit, have fun and gain confidence.

21 - Niagara Triathlon, Grimsby, ON 

The Niagara Triathlon is held at a very compact site that creates a fun, family-friendly atmosphere. Participants can race in the morning and check out Wine Country in the afternoon. There are six events offered, which involve swim legs in Lake Ontario and flat bike courses.

20-21 - Bluewater Triathlon, Bright’s Grove, ON 

There are eight events to choose from in Lambton County, with the feature event being an Olympic triathlon course, consisting of a 1.5-kilometre swim, a 40-kilometre bike, and a 10-kilometre run. The swim leg is in Lake Huron but is parallel to the shore, and the bike leg is a fast and flat out-and-back course. This race is for both solo racers and relay teams.

20-21 - XTERRA Conquer the Crater, Sudbury ON 

This 100-percent charitable event is in support of the Northern Cancer Foundation’s Miles Against Cancer fund, but don’t think it’s not competitive in nature. There are 10 direct qualifying spots for the XTERRA World Championships in Hawaii. It’s open to everyone and offers events for kids. The races are based in Kivi Park.

21 - Copper Town Triathlon, Bruce Mines, ON

This will be the 2nd annual Copper Town Triathlon being held in Bruce Mines. The race features a beautiful course. The swim starts from the Bruce Mines Marina on the shores of Lake Huron. It will transition to the bike portion that will be a looped course down Copper Bay Road and finish with a scenic paved out and back run with a few hills on Taylor Street.

28 - MultiSport Canada K-Town Triathlon, Kingston, ON 

One of the oldest races in the province, the K-Town race boasts a scenic course through Kingston and along Lake Ontario. Athletes can participate in the Long Course Triathlon or Triathlon/Duathlon. Relay entrants welcome.

28 - Subaru Triathlon Series, Owen Sound, ON

The newest addition to the Subaru Triathlon Series line-up features a Sprint and Olympic-distance triathlon. In 2020, both the Sprint and Olympic triathlons will have qualifying spots into the 2021 ITU World Triathlon Championships in Bermuda. The Sprint and Olympic duathlons will also have qualifying spots into the 2021 ITU Multisport Championships in Townsville, Australia.

30 - Kids In Triathlon - Oakville, Oakville, ON

This triathlon is part of the Kids In Triathlon (KITCan) Series. A non-competitive race series for kids aged 3 to 11 years old. It's a family-friendly environment, motivating kids to get fit, have fun and gain confidence.

TBD - Family Fun Fit’s – Collingwood’s Splash and Dash, Collingwood, ON

Fun for the entire family and part of the area's Canada Day celebrations. This is a swim-run event for kids and adults. Focus is on fun and participation. Everyone receives the same medal and applause when they cross the finish line.

TBD - Petawawa KOS Triathlon/Duathlon, Petawawa, ON

This is a Kids of Steel Triathlon event. Entry fee Includes a t-shirt, a participation medal, and post race refreshments. The duathlon entry fee does not include a t-shirt but one may be purchased.

TBD - Pure Kids Triathlon Series – Adventure Bay, Windsor, ON

The Pure Kids Triathlon Series – Adventure Bay is held in the greater Windsor-Essex region.  The event gets kids ages 3 to 13 actively engaged in sport. Proceeds go to support KidSport to get more kids involved in activities year-round.


4 - Kids In Triathlon – Milton, Milton, ON

This triathlon is part of the Kids In Triathlon (KITCan) Series. A non-competitive race series for kids aged three to 11 years old. It's a family-friendly environment, motivating kids to get fit, have fun and gain confidence.

10-11 - Barrie Triathlon, Barrie, ON

This community triathlon’s mission is to promote a healthy and active lifestyle for locals in Barrie and environs. The welcoming venue is perfect for families and fans, as they can cheer on competitors up to eight times along the route. The bike course is closed to vehicles; the swim begins with a beach start organized into heats determined by age. The running course is on a paved walking path.

10-11 - Subaru Women’s Triathlon Festival, Grimsby, ON

The Subaru Women’s Triathlon Festival and the Canadian Cancer Society (CCS) have teamed up to change the future of breast cancer. Subaru Triathlon Festival for Women 2023 is more than a fundraiser. It’s a chance for participants to come together and celebrate the survivors in their communities, who send a powerful message of hope for those living with the disease. It’s a place to honour and remember those we’ve lost to cancer. In the past 9 years, athletes have helped raise over $150,000 for the CCS breast cancer cause through the Subaru Women’s Triathlon Festival.

11 - Thousand Islands Triathlon & Duathlon, Brockville, ON

The Thousand Islands Triathlon & Duathlon features the historic Brockville Railway Tunnel as part of its run course. Nestled in beautiful Brockville, and based at the Brockville Rowing Club, this race is popular and fun for participants and spectators alike. 

17-18 - MultiSport Canada Toronto Island Triathlon, Toronto, ON

Grab your gear and hop on the ferry to the Multisport Toronto Island Tri! Not surprisingly, the swim is in Lake Ontario, and the island bike route is flat and free of traffic. Events include Sprint Triathlon, Duathlon, Aquathlon, Aquabike, Give-It-A-Tri Triathlon, and relays.

20 - Lakeshore Women's Triathlon, Saugeen Shores, ON 

This community-based event is intended to give women a venue to enter the world of triathlons. For 20 years, it has raised money for local charities. This race was previously called the Kincardine Women's Triathlon.

24-25 - Xterra Sleeping Giant, Thunder Bay, ON

The swim will be in the clean, clear, spring-fed Marie Louise Lake. From there you experience the contrast between the beauty and the beast. Beauty belongs to the undulating, predominately singletrack mountain bike trail. Intended to be a fast ride, it will provide ample opportunity for passing. Beastly better describes the more technical yet beautiful trail run. Racers will run underneath forest canopies and over creeks, all the while enjoying views of Lake Superior.

24 - MultiSport Canada Wasaga Beach Triathlon, Wasaga Beach, ON 

 This full day of events is based at the famous Wasaga Beach. After a swim in Georgian Bay, racers will have a flat and fast bike leg with a few small hills and a fast running course along the waterfront. Events: Sprint Triathlon, Duathlon, Olympic Triathlon, Aquabike, Aquathlon, and Relays.

24-25 - Cornwall Triathlon, Cornwall, ON 

The Cornwall Triathlon offers a unique experience that sets it apart from other triathlons in the region. It features traffic-free courses in the city core on both event days. Saturday events include a Duathlon of varying distances for ages 14 and under, and a Triathlon of varying distances with a pool swim for ages seven to 14. The Sunday events include a five-kilometre run, Try-A-Tri, Sprint and Olympic Triathlon distances, and a Sprint Duathlon. The swim is in the St. Lawrence River, and the run is on a riverside recreational path.

31 - The Canadian Triathlon & Duathlon, Ottawa, ON

The Canadian is the final and most exciting triathlon and duathlon event on the Somersault summer schedule. It features a dramatic finish on the Terry Fox Athletic Facility running track in front of a crowd of cheering spectators. In all, there are nine events, including the only half-Ironman event in Eastern Ontario.

31 - Draft Legal Provincial Championships, Welland, ON

This event bills itself as the closest experience to ITU (International Triathlon Union) racing in Ontario. All participants must be Triathlon Ontario members (or members of their home PGB if not an Ontario resident). All participants, with the exception of those registered in the Age Group division, must be “draft legal” certified by Triathlon Ontario. There is a team component to the Age Group draft legal race. A team will be made up of four people (of the same gender). This creates a race within a race, and team members are encouraged to work together and employ different strategies to play to each other’s strengths.

31- Subaru Triathlon Series - Guelph Lake II, Guelph, ON

The second visit to Guelph Lake Conservation Area is the perfect way to cap off a season on the Labour Day long weekend. The sprint distance features a 750-metre swim, a 30-kilometre bike, and a seven-kilometre run that never leaves the park. Try-A-Tri, Duathlon, Relay, and Swim/Bike options are available as well.

TBD - Owen Sound Kids Of Steel and Adult Try-a-Tri, Owen Sound, ON

This event includes a triathlon and an Adult Try-a-Tri. It is set to take place at the Julie McArthur Regional Recreation Centre and Victoria Park.


7-8 - MultiSport Canada Lakeside Triathlon, London, ON

The Lakeside Triathlon covers it all on this late summer weekend. The whole family can race in events that include Sprint Triathlon, Duathlon, Aquabike, Aquathlon, Olympic Triathlon, Give-It-A-Tri Triathlon, and Relays. Youth races are offered for ages three to 15.

7 Camp Tri, Long Sault, ON

Start at Milles Roche Island and swim shallow waters, bike a smooth parkway and run packed asphalt and gravel trails. 

15 - Barrelman Niagara Falls, Welland ON

The only point-to-point race in the province, this race starts at the Welland International Flatwater Centre and winds its way through the beautiful Niagara countryside, ending at the world-famous Niagara Falls. The Welland International Flatwater Centre has become an ideal location for warm, pristine open-water swimming. Swim/Bike, Bike/Run, and Relays are all optional events.

Celebrate Your Race at an Ontario triathlon

So go ahead, pick a race that suits you. Then get training, because that’s the only way to bring the finish line into focus. Invite your friends and family to cheer you along at one of these triathlon events in Ontario.

About Ian Merringer

After studying journalism at King’s College in Halifax, Ian Merringer started a freelance journalism career that has included a stint as the editor of Rapid, Canoeroots and Adventure Kayak magazines (now combined to become Paddling magazine). Over the last 20 years, he has written for the Globe and Mail newspaper and Canadian Geographic, Paddling, Ski Canada, Explore, Outdoor Canada and Ontario Nature magazines. He’s won multiple National Magazine Awards and lives in Toronto and has two canoes in his garage and another under his porch.

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