Cogswell Dam

The San Gabriel Wilderness is a wilderness area created in 1968 of more than 36,118 acres (150 km2) within the Angeles National Forest and San Gabriel Mountains National Monument. The area lies on the southern slopes of the San Gabriel Mountains, between the Angeles Crest and the West Fork of the San Gabriel River.The area was originally set aside as the Devils Canyon-Bear Canyon Primitive Area of 35,000 acres (140 km2).The San Gabriel Mountains were first preserved by the federal government in 1892 as the San Gabriel Timberland Reserve, established by U.S. President Benjamin Harrison and influenced by California conservationists, Abbot Kinney and John Muir. This forest reserve would later become part of the Angeles National Forest in which the San Gabriel Wilderness is now located.

Monrovia Peak is a 5,412-foot-elevation (1,650 meter) mountain summit located in the San Gabriel Mountains, in Los Angeles County, California, United States.

Stony Ridge Observatory is an astronomical observatory built by and for amateur astronomers in the mountains of Los Angeles County, California, in 1957. When installed, its 760 mm (30 in) Newtonian-Cassegrain likely ranked as 8th largest of all telescopes in California, and one of the largest amateur telescopes in the United States. The telescope is designed so that one of four Newtonian foci, or a Cassegrain focus, can be used. Asteroids 10168 Stony Ridge, 144633 Georgecarroll and 327030 Alanmaclure, were discovered at the observatory, and other scientific research (including an extensive lunar photography and mapping project in cooperation with Lockheed upon which the decision on the lunar lander touchdown site was based) has been conducted there. The observatory also has a 12-inch Cassegrain telescope and a number of accessory items, including CCD cameras and computer equipment. Facilities include an administration building with a small galley and bunkroom, the dome containing the 30-inch telescope, and a vault-style outhouse. The facility has Edison electric power and a landline telephone connection, but water must be carried in. Stony Ridge is located on a remote, restricted-access site north of Mt. Wilson, near Charlton Flat in the Angeles National Forest. In September 2009, Stony Ridge was at risk of being lost to a wildfire but escaped with minimal fire damage to one side of the outhouse building, although nearby ground cover was burned away, and the foliage of surrounding Coulter pines was destroyed.Recent restoration projects, completed in mid-2017, included: Re-installation of the original, George Carroll-designed right ascension and declination drive systems; installation of a Software Bisque-based "go to" system which will point the telescope at a computer-selected celestial object too faint to be seen with the naked eye or the telelescope's finder scopes; stripping and re-aluminization of the primary and secondary mirrors, which were significantly deteriorated by age, as well as smoke and heat from the infamous Station Fire, which burned more than 200 square miles of the Angeles National Forest surrounding the observatory in 2009.

Fish Canyon Falls is a tiered waterfall in Los Angeles County, California, located within the Angeles National Forest in the San Gabriel Mountains. The falls are located about 2 miles (3.2 km) northwest of Azusa on the Fish Canyon Creek. The falls drops a total of 80 feet (24 m) in four tiers. Unlike many seasonal waterfalls in Southern California, it has a fairly reliable flow year round, due to springs located further up the canyon. However, it can still dry up during the late summers of dry years. A 4.8-mile (7.7 km) round trip hike provides access to the falls.

Chantry Flat is a designated "Recreation Area" within the Angeles National Forest, about three miles (5 km) into Big Santa Anita Canyon, and is closely associated with the towns of Arcadia and Sierra Madre, CA. The flat itself houses a large public picnic area, and is the starting point for several historic trails of the San Gabriel Mountains, including the 28.5-mile (45.9 km) Gabrielino Trail. The US Forest Service estimates the road to Chantry as the third busiest entry into the Angeles, next to CA State Highways 2 and 39.

The Silver Moccasin Trail is a 53-mile (85 km) trail located in the San Gabriel Mountains, northeast of Los Angeles. It begins at Chantry Flat Recreation Area above the city of Arcadia, California, traversing upward and down through several canyons and along the high ridges of the Angeles National Forest. This trail connects Mt. Baden-Powell, Mount Burnham, Throop Peak and Mount Hawkins. It comes to its highest point of 9,399 feet (2,865 m) at Mount Baden-Powell after which point it descends to its terminus at Vincent Gap on the Angeles Crest Highway near Wrightwood.

Hughes Airwest Flight 706 was a regularly scheduled flight operated by American domestic airline Hughes Airwest from Los Angeles, California to Seattle, Washington, with several intermediate stops. On Sunday, June 6, 1971, the McDonnell Douglas DC-9 serving as Flight 706 departed Los Angeles just after 6 p.m. en route to Seattle as a McDonnell Douglas F-4 Phantom II of the United States Marine Corps was approaching Marine Corps Air Station El Toro near Irvine at the end of a flight from Naval Air Station Fallon in Nevada. The two aircraft collided in midair over the San Gabriel Mountains near Duarte, killing all 49 aboard the DC-9 and the F-4 pilot; the F-4 radar intercept officer ejected and survived. The crash of Flight 706 prompted the United States Armed Forces to agree to reduce the number of military aircraft operating under visual flight rules in civilian air corridors and to require military aircraft to contact civilian air traffic controllers.

The Gabrielino Trail is a United States National Recreation Trail that runs through the Angeles National Forest. Its western trailhead is at Windsor Avenue in Altadena, California, and it runs generally east/west, with its eastern end at Chantry Flat, just north of Arcadia, California. It passes through three major watersheds and has an elevation gain/loss of 3,500 ft (1,100 m).

Santa Anita Dam, also known as Big Santa Anita Dam, is a concrete thin arch dam on Santa Anita Creek in the San Gabriel Mountains of Los Angeles County, California. Owned by the Los Angeles County Flood Control District, the dam serves for flood control, water conservation and debris control. The dam is 225 feet (69 m) high and 612 feet (187 m) long, holding 858 acre-feet (1,058,000 m3) of water with a maximum capacity of 1,028 acre⋅ft (1,268,000 m3). The catchment area for the dam is 10.8 square miles (28 km2). The dam was built between 1923 and 1927. The dam has three valves that control releases of stormwater.The dam is situated in the steep San Gabriel foothills, north of Sierra Madre and Arcadia. It is located just north of the boundary of the Angeles National Forest. The dam is visible from Santa Anita Canyon Road, which runs along the west slope of the Santa Anita Canyon and provides access into trails further upstream along Santa Anita Creek. The viewing window for the dam is very short, only about a half-mile; the access road which runs down into the canyon from Santa Anita Canyon Road is closed to the public. However, the First Water trail, which leads downstream from Chantry Flat along the creek, is said to provide access to the reservoir. Since the 1990s the maximum allowed storage of water has been restricted, to ensure that the dam will not collapse due to seismic instability. This has partially caused rapid silting of the reservoir and sediment removal was started in mid-2009. The reservoir was drained and about 6,750,000 cubic yards (5,160,000 m3) of sediment were removed. A staged rescue at the dam was broadcast in November 1958 as an episode of the syndicated U.S. television series Rescue 8 titled "The Chasm".

Vetter Mountain is located in the San Gabriel Mountains and within the Angeles National Forest, Los Angeles County, California, United States. Elevation 5,911 feet (1,802 m) feet. Named by USFS surveyor Don McLain (c. 1933) for Victor P. Vetter (nd.), a dedicated forest ranger and fire dispatcher. Vetter won the USFS Bissell Medal for outstanding work in forest conservation (1930). The Silver Moccasin Trail crosses the mountain on its eastern slopes.

The Upton Sinclair House is a historic house at 464 N. Myrtle Avenue, Monrovia, California. Built in 1923, it was the home of American novelist Upton Sinclair (1878-1968) between 1942 and 1966, and is where he wrote many of his later works. It was listed on the National Register of Historic Places and was declared a National Historic Landmark in 1971. It is a private residence.

The Old Short Cut or Old Short Cut Cabin or Old Short Cut Ranger Station or the West Fork Ranger Station is California's first ranger station, built in 1900. The Old Short Cut Cabin was designated a California Historic Landmark (No.632) on March 3, 1958. The Short Cut Cabin is located is in what is now the Angeles National Forest in the San Gabriel Mountains of Los Angeles County. The name Old Short Cut Cabin comes from Short Cut Canyon Trail, the cabin was a popular stopping spot on the trail. The Old Short Cut Cabin was built by forest service men Louie Newcomb and Phillip Begue. At the time of construction in 1900, the forest was called the Gabriel Timberland Reserve. In 1907 the forest was renamed the San Gabriel National Forest. In 1908 it was renamed again to its current name to Angeles National Forest. The San Gabriel Forest Reserve was established on December 20, 1892. The Old Short Cut Cabin was constructed where Shortcut Canyon joins the West Fork of the San Gabriel River Canyon. The Cabin was restored and move to the United States Forest Service's Chilao Visitor Center in the 1980s just off Angeles Crest Highway.