Whalon Lake is an 80-acre former quarry lake located in Bolingbrook, Illinois, featuring a maximum depth of nearly 100 feet and an average depth of 15 feet. The lake opened to public access in 2008 after being converted from a sand, gravel, and limestone quarry that operated for nearly 50 years.

Access is via a two-lane concrete boat ramp located in the southwest portion of the lake (41.713517, -88.094652). The shoreline stretches approximately 1.5 miles and includes two islands in the southeastern section. The entire shoreline is accessible for bank fishing, and a barrier-free fishing pier provides additional access.

Only electric motors are permitted on the lake. All paddlers must wear personal flotation devices, and children under 13 must wear them at all times when on the water. Swimming and paddle boards are prohibited. The lake has an 80-watercraft capacity limit.

Wildlife viewing opportunities are abundant, with regular sightings of great blue herons, eagles, egrets, and occasional loons. The water is notably clear in many areas, allowing visibility to depths of 6 feet or more. While the lake is primarily fed by groundwater, during high water events it can receive inflow from the adjacent DuPage River.

Kayak rentals are available through The Forge at Whalon Lake during the warm season (May through October). The facility is operated by the Forest Preserve District of Will County, and the lake tends to experience stronger winds compared to other local bodies of water, making it suitable for paddlers seeking a more challenging workout.

Ice fishing and winter paddling are prohibited when ice is present on the water. The boat launches officially close for the season on October 31, though paddlers can still launch personal vessels year-round when conditions permit and no ice is present.