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One of Southern California’s most ambitious water projects, Diamond Valley Lake is a 4,500-acre off-stream reservoir created in 2003 to supplement the region’s water supply. Surrounded by golden hills near Hemet, it’s a modern marvel with world-class recreation. Boating is limited to electric motors, and there’s no swimming, preserving the lake’s clarity. Fishing is a major draw—anglers target trophy-sized largemouth bass, rainbow trout, and blue catfish. The Diamond Valley Marina offers rentals and a well-stocked tackle shop. Adjacent is the Western Science Center, featuring Ice Age fossils unearthed during the lake’s construction. Hikers and cyclists love the Lakeview Trail, a 21.8-mile loop with stunning water vistas. Although less rugged than mountain lakes, Diamond Valley dazzles with its scale, accessibility, and epic sunsets. Grab a bite in Hemet afterward at Steer ‘n Stein, a local steakhouse with generous portions.
- Surface area (mi)
- 11.56
- Max depth (ft)
- 259.19
- Elevation (ft)
- 1522.31
- Shoreline length (mi)
- 24.85
Ideal for
- Family friendly:
- Pet friendly:
- Romantic getaways:
Popular activities
- Boating
- Waterskiing
- Fishing
- Freshwater Fishing
- Jet Skiing
- Kayaking
- Canoeing
- Ice Skating
- Cross-country Skiing
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Help us improve by making a suggestion.
Marinas on Diamond Valley Lake
Nearby lakes
Where to stay
Frequently Asked Questions
Ready to dive into what Diamond Valley Lake has to offer? Let’s tackle some of the burning questions you might have as you plan your visit!
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No, swimming is not allowed in Diamond Valley Lake. The lake is a drinking water reservoir, and body contact with the water is prohibited to protect water quality and the environment.
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Diamond Valley Lake is a popular destination because it is one of the largest man-made reservoirs in Southern California, with a capacity of 800,000 acre feet and over 4,500 surface acres. It offers fishing, boating, and a tranquil atmosphere without personal watercraft. The lake also features nearby attractions like the Western Science Center and the Diamond Valley Lake Visitors Center.
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Boats on Diamond Valley Lake must be at least 12 feet long, 42 inches wide, and have 12 inches of freeboard at idle speed. Multi-hulled boats need solid and fixed decking. Motors must not pose a fire hazard, requiring Type B fire extinguishers if necessary. Personal watercraft and inflatables are not allowed.
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There is no public beach at Diamond Valley Lake. The lake, located in Hemet, California, is primarily known for its boating and fishing facilities, and it does not offer a public beach area. It is one of the largest man-made reservoirs in Southern California.
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Diamond Valley Lake is near the town of Hemet in Riverside County, California. Hemet is the closest urban area, offering various amenities and services. The lake is also accessible from other nearby cities like Banning and Beaumont.
