Long Point Portage
This portage, which crossed the isthmus joining Long Point to the mainland, was used by travelers in small craft following the north shore of Lake Erie in order to avoid the open waters and the length of the journey around the Point. Although used earlier by the Indians, the portage was first recorded in 1670 by two Sulpician missionaries, Dollier de Casson and René de Bréhant de Galinée. For about 150 years traffic increased over the carrying place, first as a result of the French expansion to the southwest, including the founding of Detroit in 1701, and, after 1783, because of the movement of settlers into this region. The portage was abandoned in 1833 when a storm broke a navigable channel through the isthmus.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.