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Register for "Thousand Islands Triathlon & Runs"

Register for "Thousand Islands Triathlon & Runs"

Thousand Islands Triathlon & Runs

Thousand Islands Triathlon & Runs

Registration Open

Thousand Islands Triathlon & Runs

Thousand Islands Triathlon & Runs

Thousand Islands Triathlon & Runs

Sunday, August 9, 2026

Sunday, August 9, 2026

Sunday, August 9, 2026

8:00 AM - 4:00 PM

Centeen Park, Brockville

Centeen Park, Brockville

Centeen Park, Brockville

70 Water St E, Brockville, ON K6V 1A4, Canada

70 Water St E, Brockville, ON K6V 1A4, Canada

70 Water St E, Brockville, ON K6V 1A4, Canada

About the Event

About the Event

About the Event

Race and explore beautiful Brockville!

Run through a piece of Canadian history - the oldest railway tunnel as part of your 1000 Islands run course. We can't overstate it - it's 500 meters long with music, lights, and shade, and it is the best course feature we've ever seen! 

Pre-Race Newsletter:

Already signed up? Check out the pre-race newsletter. It has all the last-minute info that you'll need to get the most out of the event. 

It includes our Virtual Orientation Video and our Athlete Handbook (coming soon), which are both great resources for anyone participating in the event. 

Disclaimer: 

This event will sell out early, so sign up before it's too late. 

Participants love:

  • The tunnel. Have we mentioned how amazing it is as a run venue? 

  • The short transition distances. It's our shortest transition of the year, giving you a chance for a really fast finish time.

Included in your registration is:

  • Bragging rights!

  • A FREE virtual bike fit from MyVeloFit.

  • A personalized race bib.

  • A Somersault swim cap from ROCS/Zone3sports.

  • Professional timing.

  • On-course nutrition from XACT.

  • Race Photography from FinisherPix.

  • Post-Race snacks.

  • Podium Prizes for the top 3 male, female, and non-binary finishers in each event.

  • Memories that you won't soon forget.


Age Restriction:

  • This bike course is OPEN to traffic. Participants must abide by the rules of the road and this event is 16+, given the open road. 

Past Results:

CLICK HERE to see the results from past Thousand Islands Events. All ages and abilities are welcome, and this page will show you where you might stack up!  

Strava Files:

Looking for more course details, including elevation, and direction? Click on your race distance below to see a Strava file.

Swim Course

Bike Course

Run Course

Race Options

Race Options

Race Options

9:30 AM

9:30 AM

9:30 AM

·

·

·

5K Run

5K Run

5K Run

$50.00

$50.00

$50.00

Run: 5km

8:00 AM

8:00 AM

8:00 AM

·

·

·

Olympic Swim Cycle

Olympic Swim Cycle

Olympic Swim Cycle

$85.00

$85.00

$85.00

Swim: 1–3km (varies)

8:00 AM

8:00 AM

8:00 AM

·

·

·

Olympic Triathlon

Olympic Triathlon

Olympic Triathlon

$110.00

$110.00

$110.00

Swim: 1500m, Bike: 40km, Run: 10km

8:30 AM

8:30 AM

8:30 AM

·

·

·

Sprint Duathlon

Sprint Duathlon

Sprint Duathlon

$90.00

$90.00

$90.00

Run: 5km, Bike: 20km, Run: 2.5km

9:00 AM

9:00 AM

9:00 AM

·

·

·

10K Run

10K Run

10K Run

$60.00

$60.00

$60.00

Run: 10km

9:15 AM

9:15 AM

9:15 AM

·

·

·

Sprint Triathlon

Sprint Triathlon

Sprint Triathlon

$95.00

$95.00

$95.00

Swim: 750m, Bike: 20km, Run: 5km

10:00 AM

10:00 AM

10:00 AM

·

·

·

Try a Tri (16+)

Try a Tri (16+)

Try a Tri (16+)

$85.00

$85.00

$85.00

Swim: 750m, Bike: 20km, Run: 5km

Course Maps

Course Maps

Course Maps

Run Course

Run Course

Run Course

Open this map to see the run course details for this event.

Bike Course

Bike Course

Bike Course

Open this map to see the bike course details for this event.

Swim Course

Swim Course

Swim Course

Open this map to see the swim course details for this event.

Important Deadlines

Important Deadlines

Important Deadlines

Shirt Deadline - June 29th. If you're interested in ordering an event shirt for this race, be sure to register and add a shirt to your order before the Shirt Deadline. After that date, we won't be able to add shirts to our order.

Medal Deadline - July 11th. We keep our prices low and make the finisher's medal an optional add-on. If you want to commemorate this achievement with a finisher's medal, make sure to register before July 11th and add the medal to your order. After this date, medals will be available to order subject to availability. 

Online Registration Deadline (if not already sold out) - August 6th at 6 pm. Sign up before this date to have your name included on the Athlete Wall. After this date, registration is subject to availability. Some of our races sell out, so make sure to sign up early!

Bib Pickup

Bib Pickup

Bib Pickup

Saturday, August 8th, from 3pm to 6pm at Centeen Park.  85 Water St E, Brockville, ON K6V 1A6. We'll be doing an in-person orientation at 4pm and 5pm.

Sunday, August 9th, starting at 7:00am, at Centeen Park. 85 Water St E, Brockville, ON K6V 1A6

Refund Policy

Refund Policy

Refund Policy

Refunds can only be issued if you purchase cancellation insurance. Purchasing the insurance allows you to ask for a refund anytime before the start of the race, for any reason. No questions asked!

Fundraiser

Fundraiser

Fundraiser

Our volunteers for this event are from The Sobriety House. Their mandate is to interrupt one's alcohol and/or drug use by introducing a better way of life. Their primary purpose is to assist individuals through rehabilitation to live a life free from dependency on alcohol and/or drugs.

Guides

Guides

Guides

Tourism Guide

Coming from out of town? This guide will help you make a whole trip out of your visit.

Spectator Guide

Coming to watch the event? Take a look at our spectator guide to have the best experience possible!

Everything You Need to Know Before Race Day

Everything You Need to Know Before Race Day

Everything You Need to Know Before Race Day

From start times to course maps, get all the key details you need to feel confident and prepared on race day. Review schedules, parking info, nutrition stations, and everything else to make your experience smooth and stress-free.

From start times to course maps, get all the key details you need to feel confident and prepared on race day. Review schedules, parking info, nutrition stations, and everything else to make your experience smooth and stress-free.

From start times to course maps, get all the key details you need to feel confident and prepared on race day. Review schedules, parking info, nutrition stations, and everything else to make your experience smooth and stress-free.

Happy Participants

Ready to take on your next challenge?

See what participants had to say!

See what participants had to say!

See what participants had to say!

Sheri

"I just participated in my first Duathlon today and had an absolute blast! It was well organized and the volunteers were super helpful and great. My whole event was so fun! I was especially glad to do an event that included running and biking only. I am looking forward to many more Duathlons with Somersault."

Sheri

"I just participated in my first Duathlon today and had an absolute blast! It was well organized and the volunteers were super helpful and great. My whole event was so fun! I was especially glad to do an event that included running and biking only. I am looking forward to many more Duathlons with Somersault."

Sheri

"I just participated in my first Duathlon today and had an absolute blast! It was well organized and the volunteers were super helpful and great. My whole event was so fun! I was especially glad to do an event that included running and biking only. I am looking forward to many more Duathlons with Somersault."

Randah

"Somersault events are always fun and incredibly welcoming. Adam and his team make me feel like an important part of every race. Thank you!"

Randah

"Somersault events are always fun and incredibly welcoming. Adam and his team make me feel like an important part of every race. Thank you!"

Randah

"Somersault events are always fun and incredibly welcoming. Adam and his team make me feel like an important part of every race. Thank you!"

Judy

"The thousand islands triathlon was a great event! Extremely well organized, accommodating to requests and the best volunteers ever! Can't wait for the next one 🏊‍♀️🚴‍♀️🏃‍♀️"

Judy

"The thousand islands triathlon was a great event! Extremely well organized, accommodating to requests and the best volunteers ever! Can't wait for the next one 🏊‍♀️🚴‍♀️🏃‍♀️"

Judy

"The thousand islands triathlon was a great event! Extremely well organized, accommodating to requests and the best volunteers ever! Can't wait for the next one 🏊‍♀️🚴‍♀️🏃‍♀️"

Annie

"Absolutely perfect! It was my first tri and everybody was super helpful and nice with all my questions. Logistics were great."

Annie

"Absolutely perfect! It was my first tri and everybody was super helpful and nice with all my questions. Logistics were great."

Annie

"Absolutely perfect! It was my first tri and everybody was super helpful and nice with all my questions. Logistics were great."

Julia

"Somersault consistently puts on inclusive, well organized, supportive and fun races in Ottawa and area. Been racing runs and triathlon of many distances for years. It's an institution for triathlon in Ottawa."

Julia

"Somersault consistently puts on inclusive, well organized, supportive and fun races in Ottawa and area. Been racing runs and triathlon of many distances for years. It's an institution for triathlon in Ottawa."

Julia

"Somersault consistently puts on inclusive, well organized, supportive and fun races in Ottawa and area. Been racing runs and triathlon of many distances for years. It's an institution for triathlon in Ottawa."

Michael

"An absolutely outstanding race experience, the organizers, volunteers, race marshals and vendors make Somersaults events simply amazing !!!"

Michael

"An absolutely outstanding race experience, the organizers, volunteers, race marshals and vendors make Somersaults events simply amazing !!!"

Michael

"An absolutely outstanding race experience, the organizers, volunteers, race marshals and vendors make Somersaults events simply amazing !!!"

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