Madden Lake is a small lake near Penticton in British Columbia's Thompson Okanagan region, situated within BC Fishing Region 8 at an elevation of approximately 2,755 feet (839 m).

The lake is a noted rainbow trout fishery and serves as the focal point of the Madden Lake Recreation Site, a provincial recreation site offering around nine campsites with a maximum 14-day stay.

Shoreside amenities include a boat launch, picnic tables, and a small dock, making it a practical access point for anglers and paddlers. The site accommodates tent camping and provides basic facilities.