Fox Chain-North Fishing Map 1 of a 2 Map Set. The Fox Chain O'Lakes consists of nine major lake basins connected by a series of navigable channels. It is considered the largest inland water recreational area in northeastern Illinois. This map includes Bluff Lake, Lake Catherine, Channel Lake, Grass Lake and Lake Marie. Made of durable, waterproof material Expertly researched, marked fishing areas included and boat accesses clearly marked