The Pomona Valley is located in the Greater Los Angeles Area between the San Gabriel Valley and San Bernardino Valley in Southern California. The valley is approximately 30 miles (48 km) east of downtown Los Angeles.
On March 1, 1893 the California Assembly voted 54–14 for a new county to form in the region, to be named San Antonio County, with Pomona as its seat. Los Angeles interests in the Senate rejected the concept, however, and today the eastern and western portions of the valley remain divided between San Bernardino and Los Angeles counties (San Antonio Creek).
The alluvial valley is formed by the Santa Ana River and its tributaries.The Pomona Valley is separated from San Gabriel Valley to the west by the northeastern end of the San Jose Hills, running approximately along State Route 57. The eastern boundaries are the Jurupa Hills and the Cajon Pass, (the eastern end of the San Gabriel Mountains) running near Interstate 15, which separates the Pomona Valley from the San Bernardino Valley. The northern boundary is the San Gabriel Mountains. The Chino Hills are the southern boundary that separates the Pomona Valley from northern Orange County. Historic U.S. Route 66 runs east-west across the north side of Pomona Valley. San Antonio Creek runs right through the center of the valley dividing the valley into west and east, and also acts as a section of the border between Los Angeles County and San Bernardino County. It originates from the San Gabriel Mountains watershed around Mount San Antonio (known locally as Mt. Baldy) and joins the Santa Ana River south of Chino. The Pomona Valley ranges from the city of San Dimas from the far west to Rancho Cucamonga to the far east portion of the valley.
The Pomona Valley experiences a Mediterranean Climate. In contrast to much of the Greater Los Angeles Area, The Pomona Valley can get much hotter summers with high temperatures ranging from the triple digits. Due to its elevation ranging from 800 to 2200 feet, winters in the Pomona Valley can also get cold. Trace amounts of snowfall can occur anywhere above 1500 feet. On the valley floor, average rainfall amounts range anywhere from 12 to 16 inches. Foothill communities can get anywhere from 14 to 18 inches of rain a year. In the fall (fire season), Santa Ana Winds can occur giving strong offshore winds from the Cajon Pass.
|Climate data for Pomona Fairplex, California|
|Record high °F (°C)||91|
|Average high °F (°C)||65.5|
|Daily mean °F (°C)||51.8|
|Average low °F (°C)||38.1|
|Record low °F (°C)||21|
|Average precipitation inches (mm)||3.56|
|Source: Western Regional Climate Center|
The residents of the Pomona Valley are predominantly Latino and White. In contrast to the San Gabriel Valley, the population of Asian Americans is much smaller. Northern areas of the valley that contain the cities of Claremont, La Verne, Upland, and San Dimas have large Caucasian populations. Central portions of the valley that contain the cities of Pomona, Montclair, and Ontario have large Hispanic populations. Southern portions of the Pomona Valley such as Chino Hills, Diamond Bar, and Walnut contain rather large Asian populations.
The Pomona Valley is served by several freeways:
In Claremont, Mt. Baldy Road leads into the Mt. Baldy Ski Lifts of Mount San Antonio in the San Gabriel Mountains.
San Bernardino County, officially the County of San Bernardino, is a county located in the southern portion of the U.S. state of California, and is located within the Inland Empire area. As of the 2020 U.S. Census, the population was 2,181,654, making it the fifth-most populous county in California and the 14th-most populous in the United States. The county seat is San Bernardino.
The San Gabriel Valley is one of the principal valleys of Southern California, lying generally to the east of the city of Los Angeles. Surrounding features include:
The Inland Valley Daily Bulletin is a daily newspaper based in Rancho Cucamonga, California, serving the Pomona Valley and southwest San Bernardino County. The Daily Bulletin is a member of the Southern California News Group, a division of Digital First Media. After 30 years of operations from its Ontario Office, the Daily Bulletin moved to Rancho Cucamonga in 2015.
Rancho Cucamonga was a 13,045-acre Mexican land grant in present-day San Bernardino County, California, given in 1839 to the dedicated soldier, smuggler and politician Tiburcio Tapia by Mexican governor Juan Bautista Alvarado. The grant formed parts of present-day California cities Rancho Cucamonga and Upland. It extended easterly from San Antonio Creek to what is now Hermosa Avenue, and from today's Eighth Street to the mountains.
Area codes 909 and 840 are telephone area codes in the North American Numbering Plan (NANP) for the far-eastern part of Los Angeles County and southwestern San Bernardino County in the U.S. state of California.
State Route 71 (SR 71) is a 15-mile (24 km) state highway in the U.S. state of California. Serving Riverside, San Bernardino, and Los Angeles counties, it runs from SR 91 in Corona to the Kellogg Interchange with I-10 and SR 57 on the border of Pomona and San Dimas. The segment from SR 91 to SR 83 in Chino Hills is called the Corona Freeway, formerly the Corona Expressway and before then the Temescal Freeway. SR 71 is designated as the Chino Valley Freeway between SR 83 and the Kellogg Interchange.
State Route 66 is a state highway in the U.S. state of California that runs along a section of old U.S. Route 66 in Los Angeles and San Bernardino counties. It goes from State Route 210 in La Verne east to Interstate 215 in San Bernardino, passing through Claremont, Upland, Rancho Cucamonga, Fontana and Rialto along Foothill Boulevard. In San Bernardino, it is the part of Fifth Street west of H Street.
Alta Loma is one of three unincorporated areas that became part of the city of Rancho Cucamonga, California, United States in 1977. The community is located atin the foothills of the south face of the San Gabriel Mountain range, near Cucamonga Peak and Mount San Antonio. Its ZIP codes are 91701 and 91737. Elevation ranges from 1,400 feet (430 m) to 3,000 feet (910 m). The name comes from the Spanish words for "high hill." Alta Loma had previously been known as "Iamosa".
Chaffey Joint Union High School District is a 9-12 school district located in San Bernardino County, California, United States that serves the communities of Ontario, Montclair, Rancho Cucamonga, and portions of Fontana, Upland, Chino, and Mount Baldy. With more than 25,000 students, it is one of the largest high school districts in the state. The district operates eight comprehensive high schools, one online high school, one continuation high school, one community day school, and one adult education school.
Foothill Boulevard is a major road in the city and county of Los Angeles, as well as an arterial road in the city and county of San Bernardino, stretching well over 60 miles (97 km) in length, with some notable breaks along the route. Like its name implies, Foothill Boulevard runs across the foothills of the San Gabriel and San Bernardino Mountains.
California's 28th congressional district is a congressional district in the U.S. state of California, in Los Angeles County. The district is regarded as a Democratic stronghold and has been held by the Democratic Party since 2003 and is currently represented by Democrat Adam Schiff.
California's 31st congressional district is a congressional district in San Bernardino County, in the U.S. state of California. The district is located in the Inland Empire region, including the city of San Bernardino and portions of Rancho Cucamonga. The district is currently represented by Democrat Pete Aguilar, who was first elected in 2014.
California's 35th congressional district is a U.S. congressional district in California. The district is currently represented by Democrat Norma Torres.
The Southern California Association of Governments (SCAG) is the Metropolitan Planning Organization (MPO) of six of the ten counties in Southern California, serving Imperial County, Los Angeles County, Orange County, Riverside County, San Bernardino County, and Ventura County. San Diego County's MPO is the San Diego Association of Governments, which is an unrelated agency.
The Upland–San Bernardino Line was an interurban line operated by the Pacific Electric Railway between Downtown Los Angeles and San Bernardino, California. This line also had shorter service that terminated before the end of the line at Baldwin Park, Covina, and San Dimas. Though service along this line in its entirety was discontinued in November 1941, it stands as the fourth-longest rapid transit line in American history, after the Sacramento Northern Chico and Colusa services, and the Pacific Electric's own Riverside–Rialto Line.
The Gold Line Foothill Extension is an extension of the Metro Gold Line light rail corridor from its former terminus in Pasadena, California, east through the "Foothill Cities" of Los Angeles County. The first stage of the plan, Phase 2A, extended the Gold Line from Pasadena to Azusa; it opened on March 5, 2016. Phase 2B, which will extend the line a further four stations to Pomona—North, broke ground in December 2017.
Chino Creek is a major stream of the Pomona Valley, in the western Inland Empire region of Southern California. It is a tributary of the Santa Ana River.
San Antonio Creek is a major stream in Los Angeles County and San Bernardino County, California, draining southwards from Mount San Antonio in the San Gabriel Mountains into Chino Creek, a tributary of the Santa Ana River. Upon leaving San Antonio Canyon and entering the broad alluvial plain of the Pomona Valley, it is known as the San Antonio Wash or the San Antonio Creek Channel, the former referring to the creek's seasonal dry nature below the mouth of San Antonio Canyon.
The Old Baldy Council (#043) was founded in 1917 as the Pomona Council. It changed its name in 1921 to Old Baldy. The Old Baldy name is from Mount San Antonio, often called "Old Baldy" or "Mount Baldy", the highest peak in the San Gabriel Mountains.
Palomares League is a high school athletic league in Southern California. It is a member of the CIF Southern Section, serving the eastern San Gabriel Valley and Chino Hills in San Bernardino County. The 2014–15 school year will be its inaugural season. Several of these schools were previously in what was known as the Sierra League.