Fifteen linked lakes and roughly 488 miles of connected Fox River waterway.
The Chain O'Lakes is a connected waterway system of roughly 15 named lakes in northeastern Illinois, built around the Fox River — a Prohibition-era mob retreat now known for dense pontoon-boat culture across Fox Lake, Antioch, Lake Villa, and Ingleside.
The Chain O'Lakes is a connected waterway system in northeastern Illinois spanning Lake and McHenry counties, built around the Fox River as it flows south from the Wisconsin border. The system comprises roughly 15 named lakes — three of them natural (Grass Lake, Lake Marie, and Nippersink Lake), the rest formed or connected through channel work tied to the Fox River — linked by about 488 miles of shoreline and navigable waterway. French traders and Jesuit explorers Joliet and Marquette passed through the area in 1673, and during Prohibition the lakes became a weekend retreat for Chicago's mob figures, including a 1930 shooting tied to Al Capone associates at Fox Lake's Manning's Hotel. Today the Chain is best known for dense recreational boating — pontoons, wake boats, and pontoon-bar culture — centered on the towns of Fox Lake, Antioch, Lake Villa, and Ingleside, with Chain O'Lakes State Park (established 1945, straddling the McHenry and Lake county line) anchoring the western end. Blarney Island, an offshore bar on Grass Lake reachable only by boat, has operated in some form since 1901. Businesses across this guide sit on specific named lakes within the chain rather than being blurred into one generic label.
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