Located just North of Rockford, IL (the state’s second largest city). Pearl Lake is one of the oldest private diving lakes in Illinois and offers fishing, swimming and diving. An old gravel pit, average depth is between 30 & 40 feet with a maximum depth of 85 feet. Many man made objects have been sunk in the lake to keep divers amused. Attractions include a bus (of course), boats, an airplane, concrete pipes, railroad tracks, and a two man submarine. The fish are friendly and abundant. A popular training lake for Chicago area instructors, the lake can get crowded on the weekends. Amenities include a camp ground, restaurant, bar, rest rooms, showers & changing rooms. Air fills and equipment rentals are available on site. Nitrox fills are also available. C card required. Daily entrance fee is $25. Dive season: April to October, 8AM - dusk (night diving is permitted on Sat/Sun) Pearl Lake is host to a variety of plant & animal life including bluegills, small- and largemouth bass, yellow perch, white suckers, catfish, turtles, craysish, and an assortment of mollusks. This dive destination offers many underwater attractions (see map) and is great for novice and experienced divers.