On March 25, 1847, Kane set out by canoe to Fort Victoria, which had been founded shortly before to become the new company headquarters, as the operations at Fort Vancouver were to be wound down and relocated following the conclusion of the Oregon Treaty of 1846, which fixed the continental border between Canada and the United States west of the Rocky Mountains at the 49th parallel north. Kane went up the Cowlitz River and stayed for a week among the tribes living there in the vicinity of Mount Saint Helens before continuing on horseback to Nisqually (today Tacoma) and then by canoe again to Fort Victoria.