Lake Perris is an artificial lake completed in 1973. It is the southern terminus of the California State Water Project, situated in a mountain-rimmed valley between Moreno Valley and Perris, in what is now the Lake Perris State Recreation Area. The park offers a variety of recreational activities. Because of this and the lake's proximity to major population centers, it is very crowded during the summer months.

The California Office of Environmental Health Hazard Assessment has issued a safe eating advisory for any fish caught in the Lake Perris due to elevated levels of mercury and PCBs.

Lake Perris

Ya'i Heki' Regional Indian Museum

The Ya'i Heki' Regional Indian Museum tells the story of the monumental State Water Project and focuses on the culture and history of the native peoples of the southern California desert region.

Lake Perris

Geography

Lake Perris is above sea level and is ringed by hills and small mountains. It impounds of water behind a 2-mile (3 km) long, 128 foot (39 m) tall, chevron-shaped earthfill dam. The untended areas of Lake Perris are somewhat rocky and barren.

Lake Perris

An artificial reef exists on the lake floor made of old tires. The reef was created to provide a habitat for fish.

Flora and fauna

The predominant plant community, coastal sage scrub, is host to a variety of birds and wildlife. Mule deer, roadrunners, bobcats, coyotes, rabbits, quail, gopher snakes and rattlesnakes may sometimes be seen by day, though they tend to shy away from people. More frequently seen are a wide variety of lizards, rodents, water fowl, and birds of prey. Beautiful displays of wildflowers occur during the rainy season, generally November through April.

The coastal sage scrub community is predominant on the south-facing slopes of the Russell mountains and Bernasconi hills and is characterized by shrubby plants including desert encelia, brittlebush, sagebrush, Californian black sage, Californian white sage, buckwheat, and cacti. Conditions are somewhat shadier on hillsides that face north or northwest so that chaparral plants such as chamise, penstemon, and poison oak are found.

Remnants of the original perennial grasses that once flourished in this region can still be found in the flat interior of the park surrounding the lake, but the majority of plants that now make up the valley grassland community (including Russian thistle) were imported from Europe by early settlers. Riparian areas near springs and seeps, and on east and south lakes include willows, cattails, elderberry and nettles.

More than a hundred species of birds have been spotted at Lake Perris. Many are migratory, and stop at the park briefly during their travels, while others make their permanent residence here. Meadowlarks, loggerhead shrikes, roadrunners, California thrashers, quail, wrens, sparrows, hummingbirds, golden eagles, several varieties of hawks, ospreys, and even bald eagles may be seen. Many varieties of waterfowl use the lake including pintails, American wigeons, green-winged teals, mallards, shovelers, various geese, and sometimes tundra swans and pelicans. black-necked stilts, avocets, killdeer, willets, kingfishers, egrets, and herons are attracted to the water's edge.

The lake has become a hotspot for freshwater game fishing. Largemouth bass, spotted bass, bluegill, rainbow trout, channel catfish, black crappie, red ear sunfish and carp are all present in the lake. As the climate is a warm one, the California Department of Fish and Game make regular plants of rainbow trout throughout the winter months. The lake records for each of the species are noted here: Alabama spotted bass – 9 pounds, 6 ounces Florida largemouth bass – 17 pounds, 6 ounces Bluegill – 3 pounds, 15 ounces Rainbow trout – 7 pounds Channel catfish – 30 pounds Largemouth bass, bluegill, rainbow trout, channel catfish, black crappie, redear sunfish tend to be the primary focus of anglers. The trout usually only bite in the cooler months after the DFG plants.

Day and night, hawks and owls are frequently seen hunting for prey. The bike trail offers an easy and convenient way to see some of the birds and other wildlife of Lake Perris. Early morning or dusk are the best times. Ranger-led hikes are conducted during the spring and early summer months.