Oak Grove, San Diego County, California

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.

Palomar Mountain ( PAL-ə-mar; Spanish: Monte Palomar [paloˈmaɾ]) is a mountain ridge in the Peninsular Ranges in northern San Diego County. It is famous as the location of the Palomar Observatory and Hale Telescope, and known for the Palomar Mountain State Park.

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.

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.

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.

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.

Rancho San José del Valle (also called "Rancho Agua Caliente" or "Warner's Rancho") was a 26,689-acre (108.01 km2) Mexican land grant in present-day San Diego County, California given in 1840 by Governor Juan B. Alvarado to José Antonio Pico, and then given in 1844 by Governor Manuel Micheltorena to Juan José Warner. The most northeasterly grant made within present-day San Diego County, it was bounded on the west by Palomar Mountain, and on the south by Buena Vista Creek and Rancho Valle de San Jose, and encompassed present-day Warner Springs. The western part of the grant is under the waters of Lake Henshaw, formed in 1922 by a dam on the San Luis Rey River.

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.

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.

Rancho Valle de San Jose was a 17,634-acre (71.36 km2) Mexican land grant in present day San Diego County, California given in 1836 by Governor Nicolás Gutiérrez to Silvestre de la Portilla. Located in north east of San Diego County, it was bounded on the north by Buena Vista Creek and Rancho San Jose del Valle. The western part of the grant is under the waters of Lake Henshaw formed in 1922 by a dam on the San Luis Rey River.

Warner Springs is set of springs and a small unincorporated community in northern San Diego County, California. Warner Springs is on the Pacific Crest Trail.

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.