The Rideau Canal, also known unofficially as the Rideau Waterway, connects Canada's capital city of Ottawa, Ontario, to Lake Ontarioand the Saint Lawrence River at 

The Trent–Severn Waterway is a 386 kilometres (240 mi)-long canal route connecting Lake Ontario at Trenton to Lake Huron at 

http://tvta.ca/Our-Trails.htm

The Thames Valley Trail is a 110 kilometer hiking trail which follows the Thames and North Thames Rivers along most of the route. It links the Elgin Trail at the Elgin/Middlesex County line in the south with the Avon Trail in St. Marys in the north.

greenmts posted the route:

The Fundy Circuit is a great sampling of all Fundy National Park has to offer from the coastal traverse to the interior featuring the Acadian forest, lakes, rivers, gorges and waterfalls, and a few river crossings to boot.  Fundy National Park has a nice description of the loop.  The loop links 7 trails in the park for a distance of 48km and approximately 1659 meters of ascent.