Mount Diablo State Park is located in Contra Costa County, California. It features the prominent Mount Diablo, which rises to an elevation of 3,849 feet. The park covers over 20,000 acres and offers a variety of recreational activities, including hiking, biking, and horseback riding. Visitors can enjoy stunning views of the surrounding landscape from various lookout points. The park is home to diverse wildlife and plant species, making it a great spot for nature enthusiasts. Several trails cater to different skill levels, and the park also has picnic areas for families. Mount Diablo State Park is a popular destination for both locals and tourists.