Pearl Lake Beach is a 50-acre spring-fed lake in South Beloit, Illinois, known for its crystal-clear waters and visibility, making it a popular spot for scuba diving. The lake features artificial reefs such as a sunken bus, airplane, and submarine, along with training platforms. It is a private park that allows certified divers and students for a daily fee.
The beach is open from May 22 to September 1. Camping is open from April 11 to October 11.