There are locks at the end of the Rideau Canal: a series of eight gates the step the water down from the level of Parliament Hill to the Ottawa River.
And if you’ve got a boat, they’ll crank open the gates for you, and you can go down in the morning and climb back up in the afternoon.
But here’s the thing of it. It takes two hours to traverse those eight locks: two hours each way.
That’s four hours getting there and back, and that doesn’t even include time on the river. So you really need to have time on your hands for this.