Lake Riverside, 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.

The Cahuilla Mountain Wilderness is a federally designated wilderness area located in Riverside County in Southern California. The 5,575 acres (2,256 ha) wilderness is managed by the United States Forest Service in the San Bernardino National Forest. The summit of Cahuilla Mountain sits at 5604 feet (1708 m) and provides an excellent view of the nearby Juan Bautista de Anza National Historic Trail. A trail to the top winds through the chaparral, as well as groves of live oak and Jeffrey pine. Local wildlife include mountain lion, mountain and California quail, and the rare red diamond rattlesnake.

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.

Aguanga (; Luiseño: Awáanga, meaning "dog place") is a census-designated place located within the Inland Empire, Riverside County, California. It is located about 18 miles (29 km) east of Temecula and 22 miles (35 km) south-southeast of Hemet. Aguanga lies at an elevation of 1955 feet (596 m). As of the 2010 census, it had a population of 1,028.

Beauty Mountain Wilderness is a U.S. wilderness area in Riverside County, California. It consists of 15,628 acres (63.24 km2) of very rugged and mountainous terrain. It is part of the Palm Springs - South Coast Field Office of the Bureau of Land Management, and was created by the Omnibus Public Land Management Act of 2009 from land already managed by the Bureau of Land Management.Camping is allowed in the Wilderness Area, but only for 14 days. After this time, campers must move their site at least 25 miles (40 km) from the previous site. Pets are also allowed, but must be kept "under control". Any motorized vehicles are not allowed on Wilderness land.

Radec is a small unincorporated community in Riverside County, California, United States. Located roughly 15 miles east by southeast of the city of Temecula, the community of Radec ('Cedar' spelled backwards) is located along Highway 79. Having bought land in the area in 1883, early settler Samuel Tripp set up a post office there. As of 1893–4, a local directory listed the area as growing honey, hay and stock, but also as having "no commercial interest of any kind." A total of 14 people, mainly farmers and beekeepers, plus a laborer and Tripp, are listed in the directory. The County of Riverside owns a small, non-operational cemetery in Radec.

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.

Oak Grove Butterfield Stage Station is located in the western foothills of the Laguna Mountains, in northern San Diego County, California. It is located on State Route 79, 13 miles (21 km) northwest of Warner Springs and Warner's Ranch. The station was built on the site of Camp Wright, an 1860s Civil War outpost.

Oak Grove is an unincorporated community in northern San Diego County, California, United States. The community is on California State Route 79, 22 miles (35 km) east-southeast of Temecula. It is home to the Oak Grove Butterfield Stage Station.

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.

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.

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