The Toronto Carrying Place
What came to be known as the Toronto Route or Carrying Place actually consisted of two alternate passages: one ascended the Humber River to the Holland, while a lesser one began 40 kilometres to the east and followed the Rouge River. The route connected Lakes Simcoe and Ontario and was an important trade route for the Indian nations and later the French. Étienne Brûlé travelled it in 1615 and the Iroquois reputedly used it on their way to attack Huronia in 1649. Although of lesser importance to British fur traders, it still contributed to the favourable position of the settlement which became Toronto.
Plaque via Alan L. Brown's site Toronto Plaques. Full page here.