On Fri, 03 Nov 2006 01:48:03 GMT, Lew Hodgett
wrote:

Depending on draft, about 5 ft max, the Trent-Severn Canal will take
you from the Georgian Bay to Lake Ontario.

Exactly right. At the discretion of the canal operators, they may
allow you to proceed with a bit more than 5 ft if you sign waivers.

http://www.trentonontario.com/trentsevern.html