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August 11, 2018

Thanks to all who participated in this year's swim!

You can find the results here

A fundraiser to protect our Ottawa River.

The Riverkeeper 4K open water swim is a unique, inter-provincial swimming event in the Ottawa River. Uniting both provincial shores of our river, the swim highlights the need for collaboration towards swimmable, drinkable, fishable waters! Part of the Global Swim Series, this year's swim will feature three distances: 4km, 1.5km, and 750m.

Rain date: August 12, 2018

Invite your friends to participate as well by sharing our Facebook event!

"Welcome to the fifth annual inter-provincial swim across the historic Ottawa River! It’s an honour to continue on the tradition of directing this unique event which combines swimming, awareness and fun. Take the challenge of pushing yourself to your limits and help protect our beautiful local waterways. See you riverside!"

Kenton Anzai
Riverkeeper 4K Race Director


Interested in swimming or paddling? We have all the details on how and when to register.

Find out more

Race Info

Make sure you're prepared for race day. We have all the dates, times, and details you need to ensure your swim goes smoothly!

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Do you love the Ottawa River and want to help protect our watershed? Please consider fundraising in support of Ottawa Riverkeeper.

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Not a swimmer but would like to support this event and our amazing river? We are looking for helping hands to make the day a success!

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Tom Anzai - In Memory We Swim

Tom was the founder and race director of our annual Riverkeeper 4K swim. He had a vision to swim from one shore of the historic Ottawa River to the other, swam it, then invited all fellow swimmers to participate in what he called an epic charity event. His passion for the event was contagious. He didn’t miss an opportunity to speak not only of the swim, but also of the importance of a healthy Ottawa River. Tom exemplified dedication and community service. We will remember him fondly.

Our Partners

The Riverkeeper 4K is a member of the GSS.  With more than 98,000 swimmers in 122 races, in 33 countries (and still growing), the Global Swim Series is the largest open water swim series in the world.  Earn points for participation and placing in the 4K and other GSS swims to earn ranking in the series.