It is believed that Étienne Brûlé was the first European to encounter the Humber while travelling the Toronto Carrying-Place Trail. Brûlé passed through the watershed in 1615 on a mission from Samuel de Champlain to build alliances with native peoples, but left no written record. The Trail became a convenient shortcut to the upper Great Lakes for traders, explorers, and missionaries. A major landmark on the northern end of the trail in Lake Simcoe was used to describe the trail as a whole, and eventually the southern end became known simply as "Toronto" to the Europeans.