<a href=https://rmc.ca.gov/wp-content/uploads/2020/10/LA_overhead_763px_label.jpg">  <img src="Nasa photo of the greater Los Angeles Area.png" alt=""> Nasa photo of the greater Los Angeles Area

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Map of the Rivers and Mountains Conservancy’s territory, including much of the South Bay Cities, Palos Verdes Peninsula, Long Beach, Seal Beach, the Gateway Cities, North Orange County, Eastern LA County, the Angeles National Forest, Foothills communities, Southeast LA County, and Santa Catalina Island

A space photo (from NASA) of the greater Los Angeles area to the right shows the physical geography of the greater Los Angeles area. The major surface features are indicated in the photo. Some of the other features of the region are described below.

The Antelope Valley is the west end of the Mojave Desert.) The San Gabriel Mountains, which rise to over 10,000 ft., include Angeles National Forest. A major portion of the forest (which contains two wilderness areas) lies within the RMC’s area. The San Andreas Fault separates the Antelope Valley and the San Gabriel Mountains.

South of the San Gabriel Mountains is the highly urbanized Los Angeles megalopolis, which fills the San Fernando and San Gabriel Valleys and the Coastal Plan. The foothills of the San Gabriels and the lower mountains and hills south of the San Gabriels contain most of the remaining open space in this urban area. This open space is threatened by development driven by California’s population growth of 400,000 per year. A wildlife corridor in the Puente-Chino Hills provides a connection from Cleveland National Forest (off the map to the right) to the San Gabriel River, which in turn provides a connection to Angeles National Forest. This corridor is under development threat.

The enormous shipping complex of the Los Angeles and Long Beach Harbors lies to the right of the Palos Verdes Peninsula. The RMC’s coastline includes Long Beach Harbor, the 1,000 acre Seal Beach National Wildlife Refuge, and a few, smaller wetlands threatened by development such as the Los Cerritos Wetlands which is also being restored.

As shown in the photo map, the RMC includes all or part of four rivers: the mostly concrete-lined Los Angeles River, the partially-contained San Gabriel and Santa Ana Rivers, and the free-flowing Santa Clara River. There are flood control reservoirs on all but the Santa Clara River. Because flooding is infrequent, regional parks have been created inside these reservoirs.

Two neighboring conservancies (shown on the map below), the Santa Monica Mountains Conservancy and the Baldwin Hills Conservancy, lie to the west of the RMC.

Check Out Our Interactive Map with Regional Information


The seventy-nine cities in the RMC are listed below. There are, in addition, about 21 unincorporated communities in the RMC.

Los Angeles County Orange County
Alhambra Los Angeles* Anaheim*
Arcadia Lynwood Brea*
Artesia Maywood Buena Park
Avalon Monrovia Cypress
Azusa Montebello Cypress
Baldwin Park Monterey Park Fullerton
Bell Norwalk La Habra
Bellflower Palmdale La Palma
Bell Gardens Palos Verdes Estates Los Alamitos
Bradbury Paramount Placentia*
Carson Pasadena* Seal Beach
Cerritos Pico Rivera
Claremont Pomona
Commerce Redondo Beach*
Compton Rolling Hills*
Covina Rolling Hills Estates
Cudahy Rosemead
Diamond Bar San Dimas
Downey San Gabriel
Duarte San Marino
El Monte San Pedro
El Segundo* Santa Clarita*
Gardena Santa Fe Springs
Glendora Sierra Madre
Harbor City South El Monte
Hawaiian Gardens South Gate
Hawthorne South Pasadena*
Hermosa Beach Temple City
Huntington Park Torrance
Industry Vernon
Inglewood* Walnut
Irwindale West Covina
La Habra Heights Willowbrook
La Mirada Wilmington
La Puente Whittier
La Verne
Long Beach
* Only portions of the cities of Inglewood, Los Angeles, Palmdale, Pasadena, Santa Clarita, and South Pasadena in LA County and Anaheim, Brea, and Placentia in Orange County are in the RMC area.


* Only portions of the cities of Los Angeles, Palmdale, Pasadena, Santa Clarita, and South Pasadena in LA County and Anaheim, Brea, and Placentia in Orange County are in the RMC area.

** More info on cities and other RMC partners can be found here