California's 42nd congressional district

Wildomar is a city in southwest Riverside County, California, United States. The city was incorporated on July 1, 2008. As of the 2020 census, the population was 36,875. The community has grown very quickly during the early twenty-first century; the population has more than doubled since the 2000 census, when the community was still an unincorporated census-designated place.

Elsinore Valley is a graben rift valley in western Riverside County, California, a part of the Elsinore Trough. The Elsinore Valley is a graben between the Santa Ana Block to the southwest and the Perris Block on the northeast. It is a complex graben, divided lengthwise into several smaller sections by transverse faults. The Elsinore Valley graben is bounded northeast side by the Glen Ivy longitudinal fault on the north shore of Lake Elsinore at the foot of the Clevelin Hills and similarly on the southeast by the Willard Fault that runs along the foot of the Santa Ana Mountains and parallel to the Elsinore Fault along the southwest shore of Lake Elsinore to Rome Hill and the Willard Fault continues on as the west side of the Temecula Valley graben and Wolf Valley graben. At the south end of Lake Elsinore the Wildomar Fault enters the lake just east of Rome Hill, running southeast on the northwest side of the Temecula Valley. The Elsinore Valley is marked in the south by the rise between the Elsinore and Temecula Valley. In the north the valley bounds are marked by the Santa Ana Mountain ridges moved eastward along the Los Pinos and Lucerne transverse faults, dividing the Elsinore Valley from the Temescal Valley graben.

California Lutheran High School (CLHS) California Lutheran is a private, college-preparatory, Christian high school in Wildomar, California, United States. Students come from the Temecula metro area, Lake Elsinore, and Riverside County. International students enroll from China, South Korea, Ethiopia, Nigeria, Japan, Brazil, and Hong Kong, among others. California Lutheran is an Area Lutheran High School operated by the Wisconsin Evangelical Lutheran Synod (WELS). The school is accredited by the Accrediting Commission for Schools of the Western Association of Schools and Colleges.

Rome Hill, also called St. Davids Hill, is a small summit at the southeast corner of Lake Elsinore. It lies at an elevation of 1,444 feet/440 meters.

Sedco Hills is a former census-designated place (CDP) in Riverside County, California, United States. The population was 3,078 at the 2000 census. Sedco Hills became part of the City of Wildomar upon its incorporation on July 1, 2008.

Elsinore Peak is a named 3,575-foot (1,090 m) summit, at the southern end of the mountain ridge running southeast from the vicinity east of El Cariso in the Elsinore Mountains, in Riverside County, California in the United States.

The San Jacinto River is a 42-mile-long (68 km) river in Riverside County, California. The river's headwaters are in Santa Rosa and San Jacinto Mountains National Monument. The lower portion of the 765-square-mile (1,980 km2) watershed is urban and agricultural land. As a partially endorheic watershed that is contiguous with other Great Basin watersheds, the western side of the San Jacinto Basin is a portion of the Great Basin Divide.

The Elsinore Mountains are a ridge of mountains within the larger range of the Santa Ana Mountains, in the Cleveland National Forest, Riverside County, California, United States. the tallest peaks within the range is the unofficially named San Mateo Peak at 3,591 ft (1,095 m). Second is officially named Elsinore Peak at 3,536 ft (1,078 m). The Elsinore Mountanins run in a ridge from just east of El Cariso, southeast to Elsinore Peak. Beyond that peak the ridge begins to descend and curves to the east. From Elsinore Peak, a ridge runs to the west and then northwest to San Mateo Peak, enclosing the Morrell Potrero on the south and west. Decker Canyon Creek and Morrell Canyon Creek, tributaries of San Juan Creek, and San Mateo Creek have their sources on the western face of the Elsinore Mountains. Los Alamos Canyon Creek, and its tributary Wildhorse Canyon Creek, tributaries of San Mateo Creek, drain its south facing slopes. The ephemeral streams on the eastern slopes drain into Lake Elsinore (tributary to the Santa Ana River), except on the far southeastern ridge, where they are tributary to Murrieta Creek, a tributary of the Santa Margarita River.

Rancho Santa Rosa was a 47,815-acre (193.50 km2) Mexican land grant in present day Riverside County, California given in 1846 by Governor Pio Pico to Juan Moreno. At the time of the US patent, Rancho Santa Rosa was a part of San Diego County. Riverside County was created by the California Legislature in 1893 by taking land from both San Bernardino and San Diego Counties. The site is now registered as a California Historical Landmark.

Lakeland Village is a census-designated place (CDP) in Riverside County, California, United States. The population was 11,541 at the 2010 census, more than double the 5,626 reported at the 2000 census.

Rancho La Laguna was a 13,339-acre (53.98 km2) Mexican land grant in present-day Riverside County, California given in 1844 by Governor Manuel Micheltorena to Julian Manriquez. The rancho lands are included in the present day city of Lake Elsinore and Wildomar. At the time of the US Patent, Rancho Laguna was a part of San Diego County. The County of Riverside was created by the California Legislature in 1893 by taking land from both San Bernardino and San Diego Counties.