Related Links The Metropolitan Water District is a consortium of 26 water agencies that serve over 19 million people throughout California. The Western Science Center is a museum located at the entrance to Diamond Valley Lake. The Western Center is home to a large collection of Native American artifacts and Ice Age fossils that were unearthed at Diamond Valley Lake. The California Department of Fish & Game maintains native fish, wildlife, plant species and natural communities for their intrinsic and ecological value and their benefits to people. The Valley-Wide Recreation District provides parks and activities in the community surrounding Diamond Valley Lake. Serving and promoting local businesses throughout the entire San Jacinto Valley region. A reference site on the history and various techniques of fly fishing. Fishing resource and forum covering all of California. Information source for bass fishing west of the Rockies. The California Parks Company is the concessionaire operating Diamond Valley Marina. We work with local, state, and national agencies at 19 locations throughout California. FitKid is a program created by the California Parks Company to reward kids for choosing healthy foods and activities. is your best resource for angling news and tips in the northern part of the state. Lake Hemet Campground is nestled in the San Jacinto Mountains and offers several options for a unique and memorable camping experience.