Diamond Valley Lake is 4.5 miles long and 2 miles wide. It has 4,500 surface acres and holds 260 billion gallons. It is Southern California's largest freshwater reservoir. Opened in 2003, the Colorado River and Northern California supplied the water for the lake.

Nearly 110 million cubic yards of materials were used to build the West, East and Saddle dams that comprise the largest earthfill dam project in the United States.

Species available in the lake include largemouth, smallmouth and striped bass, bluegill, red ear sunfish, blue and channel catfish and rainbow trout.

No swimming, personal watercrafft, water skiing, float tubes or body contact of any kind is allowed. Boats with four-stroke or direct fuel injection two stroke combustion engines are allowed, as are two stroke engines that comply with the CARB 2001 or later model year spark ignition marine engine standard. Traditional carbureted two-stroke engines are not allowed. Only gasoline free of MTBE is allowed, boats containing gas mtbe will be turned away.

The speed limit on the lake is 25 mph.

Since 1998, California Department of Fish and Game Biologist Mike Giusti has been cultivating a model, multi-tier fishery here, and early reports suggest that the quantity and size of catches will be staggering. The reservoir has been richly stocked with a variety of popular species.

Black bass, perhaps the favorite quarry of Southern California fishermen, were established with broodstock in a rearing pond, built in what is now the lake bottom. With that head start, the first spawn are now getting large in size. Northern and Southern bluegill and redear sunfish were introduced in 1998. Florida largemouth bass were planted in 1999, with smallmouth following in 2000. One hundred thousand subcatchable rainbow trout, planted in 2000, are growing rapidly. Tasty channel catfish and blue catfish, which have grown as large as 100+ pounds in Southern California, are also prevalent. Forage fish include tule perch stocked in 2000, and inland silverside, prickly sculpin, green sunfish and threadfin shad introduced with water as the reservoir has filled.

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Recent Reports

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Name: Tony Lain	Date: 2009-05-26
Location: Sun city	E-Mail: caohtony@verizon.net
Water Teamp: 72	Water Clarity: 3
Report: Water level was nearly 100 feet below normal. Saw islands, rock piles and long points that I had no idea were there. Rental boat was a step down from the Champion (LOL), but we had a great time. Got a tour of the lake with Mike Guitsi, one of the guys who designed this lake. Great bite! Couple good fish on top water, and a bunch of nice fish on Texas worms, Brush Hogs, and the DVL favorite DS. About 20 fish caught, 3.5 pound average, biggest was 5 pounds.
Tips: No change here. Fish points and islands in about 25 - 35 feet of water. Big brown worms, Watermelonseed Brush Hogs, and that little pink worm still gets big bites.