this weekend is the annual Lock & Paddle at the Peterborough lift lock, anyone else going? the idea is to cram as many paddlers into each lock basin as possible, Last year we managed an estimated 375 boats, it's open to canoes and kayaks only, no paddleboards or surf skis...
best of all is it's free!
https://parks.canada.ca/lhn-nhs/on/trentsevern/activ/eclusez-pagayez-lock-paddle