Castaic Lake is a large reservoir located in Los Angeles County, California. It was created in the 1970s by damming the Castaic Creek and serves as a vital water supply for the region. The lake covers approximately 3,100 acres and has a maximum depth of around 300 feet. The area surrounding Castaic Lake offers various recreational activities, including fishing, boating, and hiking. It is a popular destination for both locals and visitors, providing scenic views and opportunities for outdoor enjoyment. The lake is also home to diverse wildlife, making it an important ecological area.