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Chicago Harbor and Lock


108 N. Streeter Dr.




Sat, Oct 19: 10am - 3pm

Sun, Oct 20: 10am - 3pm

Photography Permitted



The Chicago Harbor Lock separates the Chicago River from Lake Michigan. Built during the 1930s, it controls the movement of water between the Chicago River and Lake Michigan, helping maintain the reversal of the river. Able to accommodate up to 100 vessels at once, the locks are among the busiest in the nation, and are operated by the US Army Corps of Engineers. They are 600 feet long, 80 feet wide, and 22 feet deep.

Visitor Experience

Take a tour of this important part of Chicago’s maritime infrastructure with US Army Corps of Engineers personnel. Visitors will walk the length of the lock chamber, and learn about the history and operation of the locks. Reservations required. Note: Please wear comfortable walking shoes. Sneakers/tennis shoes best option - No open toe shoes, high-heels or platforms.

RSVP Only site: This site requires advance registration and will not accept drop-in visitors. Please go to TodayTix for details on how you can visit this site.