South Lake Reservoir is a man-made lake located in the Sierra Nevada mountains in California. It was built in the early 1900s to provide water to the city of Los Angeles. The lake is fed by South Fork Bishop Creek and several smaller tributaries, as well as snowmelt from the surrounding mountains. The water is then transported through a series of aqueducts and pipelines to the city. The reservoir also serves as a source of irrigation for nearby farmland and supports recreational activities such as fishing, boating, and camping. The lake's water level is heavily influenced by the snowpack in the surrounding mountains, which typically reaches its peak in April and May. In recent years, the lake has suffered from drought conditions, leading to concerns about its long-term sustainability.