Cahuilla Mountain Wilderness

Cahuilla, pronounced , (formerly, Kawia, Coahuilla, Cohuilla, and Coahuila) is an unincorporated community in Riverside County, California. It is part of the Cahuilla Reservation and lies in a high desert valley at an elevation of 3642 feet (1110 m). It is located 27 miles (43.5 km) south by road from mile-high Idyllwild. Cahuilla is on SR 371, about 4 miles (6.4 km) west of Anza, California. The Cahuilla Post Office first opened in 1888, moved in 1889 and 1895, closed in 1903, reopened in 1909, closed for a time in 1919, closed again in 1921, reopened in 1924 before closing for good in 1926. In 1926, the Anza Post Office was officially established.: 12 Facilities in Cahuilla have addresses on Highway 371 and use Anza, CA as their postal code. The Cahuilla Casino, first opened in 1996, and Mountain Sky Travel Center, a convenience store and gas station first opened in 2015, are both owned by the Cahuilla Band of Mission Indians of the Cahuilla Reservation and both located in Cahuilla with addresses in nearby Anza. A new casino and hotel, after some delay from the coronavirus, replaced the old casino and was opened May 2020.

Lake Riverside is a census-designated place in the south western part of Riverside County, California. Lake Riverside sits at an elevation of 3,379 feet (1,030 m). The 2010 United States census reported Lake Riverside's population was 1,173. The community is named after the man-made Lake that the community surrounds.

Anza Valley, formerly known as the Hamilton Plains, is a basin in Riverside County, California. Anza Valley trends southwest from Bautista Canyon, west of Thomas Mountain to Terwilliger Valley, 2.8 miles west-southwest of Table Mountain and 12 miles south of Idyllwild. The valley lies at an elevation of 4,157 feet (1,267 m), west of the San Jacinto and Santa Rosa Mountains. It is drained by Cahuilla Creek, a tributary of the Santa Margarita River.

The Ramona Band of Cahuilla is a federally recognized tribe of Cahuilla Indians, located in Riverside County, California.

Cahuilla Creek is a tributary stream of Wilson Creek which is in turn a tributary of Temecula Creek, and the Santa Margarita River in Riverside County, California. Its mouth is at its confluence with Wilson Creek at an elevation of 2,106 feet (642 m). Its source is at 33°36′40″N 116°40′10″W, at an elevation of 5,800 feet, on the west slope of Thomas Mountain 0.6 miles west-southwest of Tool Box Spring. It flows southwest through the Anza Valley and Cahuilla Valley in the Cahuilla Indian Reservation to Wilson Creek, 7 miles south-southwest of Cahuilla Mountain and 20 miles south-southeast of San Jacinto.

Anza is a census-designated place located in southwestern Riverside County, California, in the Anza Valley, a semi-arid region at a mean elevation of 3,921 feet (1,195 m) above sea level. It is located 13 miles (21 km) south of Idyllwild, 32 miles (51 km) east-northeast of Temecula, 40 miles (64 km) southwest of Palm Springs, and 90 miles (140 km) northeast of San Diego, being traversed by State Route 371. Anza is on the Pacific Crest Trail. The population was 3,075 at the 2020 census. Locally, Anza and several other mountain communities (including Garner Valley, Idyllwild, Pinyon Pines and Aguanga) are collectively referred to as "the Hill." The ZIP code is 92539, and the community is inside area code 951.

Lake Hemet Dam, located in Mountain Center, California, impounds the South Fork of the San Jacinto River and creates Lake Hemet. The dam and lake are surrounded by the San Bernardino National Forest. The dam is operated by the Lake Hemet Municipal Water District, which supplies water to parts of the cities of Hemet and San Jacinto as well as the Garner Valley community of Mountain Center.

Hamilton Creek is a tributary stream of Cahuilla Creek, (itself a tributary of Wilson Creek, Temecula Creek, and the Santa Margarita River), in Riverside County, California. Its mouth is found in the Anza Valley at an elevation of 3,865 feet (1,178 m). Its source is at 33°32′46″N 116°34′36″W at an elevation of 4,800 feet on the southwest facing slope of Lookout Mountain in the Santa Rosa Mountains.

Hamilton High School is a public high school in Anza, California, United States. It became a true 9-12 high school in the school year 2006–2007. The school was used as an evacuation center during the Mountain Fire in July 2013.

Lake Hemet is a water storage reservoir located in the San Jacinto Mountains in Mountain Center, Riverside County, California, with a capacity of 14,000 acre-feet (17,000,000 m3) of water. It was created in 1895 with the construction of Lake Hemet Dam. Originally built by a private company, today it is owned and operated by the Lake Hemet Municipal Water District (LHMWD).

The Cranston Fire was a wildfire that burned in southwest Riverside County, California, in the United States. The fire was started on July 25, 2018, by Brandon M. McGlover, in an act of arson. The fire burned a total of 13,139 acres (53 km2), before it was fully contained on August 10. The Cranston Fire impacted the communities of Idyllwild and Mountain Center, as well as recreational activities in the Lake Hemet area, San Bernardino National Forest and Mount San Jacinto State Park. Over 7,000 people were evacuated due to the Cranston Fire.

Mountain Center is an unincorporated community and census-designated place in the San Jacinto Mountains, within western central Riverside County, California.