33 CFR 100.912 - Detroit Belle Isle Grand Prix, Detroit, MI.
(a)Regulated Area. A regulated area is established to include all waters of the Detroit River near Belle Isle, bounded by a line extending from a point of land on the southern shore of Belle Isle located at position 42°20′00″ N; 082°59′45″ W, to 50 yards offshore at position 42°19′57″; 082°59′43″, and continuing at a distance of 50 yards around the western end of Belle Isle to the Belle Isle Bridge, maintaining a constant distance of 50 yards from the shoreline and terminating at position 42°20′28″; 082°59′43″ on the northern side of Belle Isle, adjacent to a point on land at position 42°20′24″ N; 082°59′48″ W (NAD 83). This area wraps around the downstream end of Belle Isle.
(c)Enforcement Period: The last weekend in August. The exact dates and times for this event will be determined annually.