Fishing, Launch Ramps, Marina, Fuel. Extends from Detroit north to New Baltimore, Michigan. This large body of water is one of Detroit's popular boating playgrounds. Fishing and general boating is the most popular activity. Lake St. Clair a popular with Freighters and larger craft linking to Lake Erie and Lake Huron. Ontario Canada lies to the East. ST CLAIR IS A RIOT!!!! The only place in the world where you can site fish for cats is in the spring from the end of April to the end of May on Anchor Bay. The mouth of the Detroit River is supposed to be great The river side of Belle Isle is supposed to be ghreat Out in front of Gino's Surf avbout 500 yards, anchored off bottom with liver Out in front of the red run drain 400 yards is a stormwater letoff. many big cats caught there. Mouth of the Clinton River at 16 mile Selfrige hotponds Out by the seawall of the 9 mile USCG jefferson mooring station with cutbait at night works well. Try them all!!!!!!!