Palomar Mountain

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.

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.

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.

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.

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.

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.

Agua Tibia Wilderness (ATW) is a 17,961-acre (72.69 km2) protected area in Riverside and San Diego counties, in the U.S. state of California. It is mostly within the Palomar Ranger District of the Cleveland National Forest. The area was originally protected as the Agua Tibia Primitive Area until January 1975 when it was added to the National Wilderness Preservation System with the passage of Public Law 93-632 by the United States Congress. Between its inception and 1984, the ATW was San Diego County's only officially designated wilderness area. The Spanish name, Agua Tibia, translates as warm water. Its approximate boundaries are: North – SR 79 East – Arroyo Seco River South – Fray Creek West – Pala Road

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.

Wilson Creek is a tributary stream of Temecula Creek, itself a tributary of the Santa Margarita River, in Riverside County, California. Its mouth is at its confluence with the reservoir of Vail Lake on Temecula Creek at an elevation of 1,460 feet (450 m). Its source is located on the south slope of Little Cahuilla Mountain at 33°36′21″N 116°48′44″W, at an elevation of 4,880 feet (1,490 m). It descends south and southwest into Reed Valley, then to its confluence with Cahuilla Creek at the head of Wilson Valley. There it turns to flow westward through Wilson Valley and Lancaster Valley to its confluence with Vail Lake.

Vail Lake is a large reservoir in western Riverside County, southern California.

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.