Mount Wilson Toll Road

KWHY-TV (channel 22) is a Spanish-language independent television station in Los Angeles, California, United States. It is owned by Meruelo Broadcasting alongside Garden Grove–licensed KBEH (channel 63); the two stations share RF channel 4 under a channel sharing agreement. KWHY and KBEH share studios on West Pico Boulevard in the Mid-City section of Los Angeles and transmitter facilities atop Mount Wilson.

KAZA-TV (channel 54) is a television station licensed to Avalon, California, United States, serving the Los Angeles area as an owned-and-operated station of the classic television network MeTV. It is owned by Weigel Broadcasting alongside Bishop-licensed KVME-TV (channel 20) and low-power Class A MeTV+ station KHTV-CD (channel 6), Ontario-licensed Catchy Comedy outlet KPOM-CD (channel 14), and Jewelry Television affiliate KSFV-CD (channel 27). KAZA-TV's studios are located on Grand Central Avenue in Glendale, and its transmitter is located at the Mount Harvard Radio Site in the San Gabriel Mountains. KAZA-TV's primary channel is separate from the MeTV feed on the third digital subchannel of Anaheim-licensed KDOC-TV (channel 56), a Tri-State Christian Television (TCT) owned-and-operated station. Even though KAZA-TV is licensed as a full-power station, its broadcasting radius does not reach all of Greater Los Angeles as it shares spectrum with KHTV-CD. Therefore, the station relies on cable and satellite carriage to reach the entire market.

KOCE-TV (channel 50) is a PBS member television station licensed to Huntington Beach, California, United States, serving the Los Angeles area. It is owned by the Public Media Group of Southern California alongside the market's secondary PBS member, KCET (channel 28). The two stations share studios at The Pointe (on West Alameda Avenue and Bob Hope Drive, between The Burbank Studios and Walt Disney Studios complexes) in Burbank; KOCE-TV maintains a secondary studio at the South Coast Corporate Center (in the South Coast Metro area) in Costa Mesa and transmitter facilities atop Mount Harvard (adjacent to Mount Wilson). Since 2011, the station has been branded as PBS SoCal. KOCE-TV and KCET are two of four PBS member stations serving Greater Los Angeles (the others being San Bernardino–based KVCR-DT [channel 24], which mainly serves the Inland Empire, and the Los Angeles Unified School District–run KLCS [channel 58]).

KBEH (channel 63) is a television station licensed to Garden Grove, California, United States, serving the Los Angeles area as an affiliate of Canal de la Fe, a Spanish-language religious network. It is owned by Meruelo Broadcasting alongside Spanish independent KWHY-TV (channel 22); the two stations share channel 4 for their broadcasts. KBEH and KWHY share studios on West Pico Boulevard in the Mid-City section of Los Angeles and transmitter facilities atop Mount Wilson. Channel 63 was originally allocated to Oxnard and began broadcasting in 1985 as KTIE-TV, a local independent station for the Ventura County area. It struggled through its original ownership and was sold to Meshulam Riklis in 1988. KTIE-TV was renamed KADY-TV, after Riklis's daughter, Kady Zadora. General manager John Huddy acquired the station in 1991 but left a financial mess in his wake, leading to a court-appointed receivership in 1996. The station stabilized under its next owner, media broker Brian Cobb. In 2004, KADY-TV built a booster increasing its Los Angeles coverage and was sold to Bela Broadcasting, which switched it to Spanish-language programming. Since the sale, KBEH has primarily been a Spanish-language station under several owners, with program sources including MTV Tres, the short-lived CNN Latino, and its present programming from the Universal Church of the Kingdom of God.

KPXN-TV (channel 30) is a television station licensed to San Bernardino, California, United States, serving as the Ion Television outlet for the Los Angeles area. It is owned and operated by the Ion Media subsidiary of the E. W. Scripps Company alongside Inglewood-licensed station KILM (channel 64). Through a channel sharing agreement, the two stations transmit using KPXN-TV's spectrum from an antenna atop Mount Wilson.

KILM (channel 64) is a television station licensed to Inglewood, California, United States, broadcasting the Bounce TV network to the Los Angeles area. It is owned and operated by the Ion Media subsidiary of the E. W. Scripps Company alongside San Bernardino–licensed Ion Television station KPXN-TV (channel 30). Through a channel sharing agreement, the two stations transmit using KPXN-TV's spectrum from an antenna atop Mount Wilson.

Mount Wilson is a peak in the San Gabriel Mountains, located within the San Gabriel Mountains National Monument and Angeles National Forest in Los Angeles County, California. With only minor topographical prominence the peak is not naturally noticeable from a distance, although it is easily identifiable due to the large number of antennas near its summit. It is a subsidiary peak of nearby San Gabriel Peak. It is the location of the Mount Wilson Observatory, which is an important astronomical facility in Southern California with historic 60-inch (1,524 mm) and 100-inch (2,540 mm) aperture telescopes, and 60-foot (18.3 m) and 150-foot (45.7 m) tall solar towers. The newer CHARA Array, run by Georgia State University, is also sited there and does important interferometric stellar research. The summit is at 5,710 feet (1,740 m). While not the tallest peak in its vicinity, it is high enough in elevation that snow can sometimes interrupt astronomical activities on the mountain. All of the mountains south of the summit are far shorter leading to unobstructed views across the Los Angeles Basin, Orange County, the Inland Empire, and out to Ventura County, San Diego County and the Pacific Ocean. On most days, Santa Catalina Island, some 65 mi (105 km) south, is visible. On clear days, other Channel Islands visible include San Clemente Island at 95 mi (153 km), Santa Barbara Island at 76 mi (122 km), San Nicolas Island at 107 mi (172 km), Santa Cruz Island at 98 mi (158 km) and San Miguel Island at 133 mi (214 km). At an elevation of 5,710 ft (1,740 m), the horizon on the ocean extends 92 mi (148 km). Mount Wilson is also heavily utilized for relay broadcasting of radio and television for the Greater Los Angeles Area.

The CHARA (Center for High Angular Resolution Astronomy) array is an optical interferometer, located on Mount Wilson, California. The array consists of six 1-metre (40 in) telescopes operating as an astronomical interferometer. Construction was completed in 2003. CHARA is owned by Georgia State University (GSU).

The Santa Anita Ordnance Training Center also called Camp Santa Anita was training center built for World War II. Santa Anita Ordnance Training Center Rifle Range was built is what is now the foothills of the San Gabriel Mountains in the Angeles National Forest, just north of East Pasadena, California and Sierra Madre, California. The 1029 acres camp, opened on November 30, 1942, was used for rifle and pistol training. Also at the range was small anti-aircraft range and an infiltration course, a type of obstacle course. The range closed in 1944 and the land lease ended in 1950. Most of troops trained at the range were based at the U.S. Army Ordnance Corps's Santa Anita Ordnance Training Center at the Santa Anita Racetrack in Arcadia, California in Los Angeles County. Before used as a training center the Santa Anita Racetrack was used for the Santa Anita assembly center a temporary internment camp for Japanese Americans from March 27 to October 27 of 1942. Camp Santa Anita was also used to hold German prisoner of war, held at the camp was several thousand of Erwin Rommel's Afrika Korps troops captured during the North African campaign. The Center had some Italian Service Units working at the depot.

The 1991 Sierra Madre earthquake occurred on June 28 at 07:43:55 local time with a moment magnitude of 5.6 and a maximum Mercalli intensity of VII (Very strong). The thrust earthquake resulted in two deaths, around 100 injuries, and damage estimated at $33.5–40 million. The event occurred beneath the San Gabriel Mountains on the Clamshell–Sawpit Fault, which is a part of the Sierra Madre–Cucamonga Fault System. Instruments captured the event at a number of strong motion stations in Southern California.

The Mount Wilson Observatory (MWO) is an astronomical observatory in Los Angeles County, California, United States. The MWO is located on Mount Wilson, a 5,710-foot (1,740-meter) peak in the San Gabriel Mountains near Pasadena, northeast of Los Angeles. The observatory contains two historically important telescopes: the 100-inch (2.5 m) Hooker telescope, which was the largest aperture telescope in the world from its completion in 1917 to 1949, and the 60-inch telescope which was the largest operational telescope in the world when it was completed in 1908. It also contains the Snow solar telescope completed in 1905, the 60 foot (18 m) solar tower completed in 1908, the 150 foot (46 m) solar tower completed in 1912, and the CHARA array, built by Georgia State University, which became fully operational in 2004 and was the largest optical interferometer in the world at its completion. Due to the inversion layer that traps warm air and smog over Los Angeles, Mount Wilson has steadier air than any other location in North America, making it ideal for astronomy and in particular for interferometry. The increasing light pollution due to the growth of greater Los Angeles has limited the ability of the observatory to engage in deep space astronomy, but it remains a productive center, with the CHARA array continuing important stellar research. The initial efforts to mount a telescope to Mount Wilson occurred in the 1880s by one of the founders of University of Southern California, Edward Falles Spence, but he died without finishing the funding effort. The observatory was conceived and founded by George Ellery Hale, who had previously built the 1 meter telescope at the Yerkes Observatory, then the world's largest telescope. The Mount Wilson Solar Observatory was first funded by the Carnegie Institution of Washington in 1904, leasing the land from the owners of the Mount Wilson Hotel in 1904. Among the conditions of the lease was that it allow public access.

KLCS (channel 58) is a tertiary PBS member television station in Los Angeles, California, United States. Owned by the Los Angeles Unified School District (LAUSD), it is one of eight television stations in the U.S. that are operated by a local school system. KLCS' studios are located at the former Downtown Magnets High School campus on West Temple Street in downtown Los Angeles, and its transmitter is located atop Mount Wilson. KLCS is one of four PBS member stations in the Los Angeles market; the others are KVCR-DT (channel 24) in San Bernardino, which serves the Inland Empire; KOCE-TV (channel 50) in Huntington Beach; and KOCE-TV's sister station KCET (channel 28) in Los Angeles, which KOCE-TV replaced in 2011 as the city's primary PBS station. Since the spectrum auction in 2018, when KLCS sold its physical channel, it has been a guest on KCET's channel 28 signal. KLCS remains the fifth most-watched public television station in the country.