Linked by the Blue Water International Bridge with Sarnia, Ontario, at the point where Lake Huron empties into the St. Clair River, Port Huron is the center of the St. Clair River manufacturing district. It is one of the oldest settlements in the state, dating from 1686 when the French built Fort St. Joseph to guard against possible British incursions into their fur trade. The first permanent colony, however, was not established until 1790. Learn More...