The San Gabriel Mountains are a mountain range located in northern Los Angeles County and western San Bernardino County, California, United States. The mountain range is part of the Transverse Ranges and lies between the Los Angeles Basin and the Mojave Desert, with Interstate 5 to the west and Interstate 15 to the east. The range lies in, and is surrounded by, the Angeles and San Bernardino National Forests, with the San Andreas Fault as its northern border.
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 east of downtown Los Angeles, which can often be seen from nearby foothills. It ranges from the city of San Dimas from the far west to Rancho Cucamonga to the far east portion of the valley. The alluvial valley is formed by the Santa Ana River and its tributaries.
The Santa Ana River is the largest river entirely within Southern California in the United States. It rises in the San Bernardino Mountains and flows for most of its length through San Bernardino and Riverside Counties, before cutting through the northern Santa Ana Mountains via Santa Ana Canyon and flowing southwest through urban Orange County to drain into the Pacific Ocean. The Santa Ana River is 96 miles (154 km) long, and its drainage basin is 2,650 square miles (6,900 km2) in size.
The San Bernardino Mountains are a high and rugged mountain range in Southern California in the United States. Situated north and northeast of San Bernardino and spanning two California counties, the range tops out at 11,503 feet (3,506 m) at San Gorgonio Mountain – the tallest peak in all of Southern California. The San Bernardinos form a significant region of wilderness and are popular for hiking and skiing.
The Rio Hondo is a tributary of the Los Angeles River in Los Angeles County, California, approximately 16.4 miles (26.4 km) long. As a named river, it begins in Irwindale and flows southwest to its confluence in South Gate, passing through several cities. Above Irwindale its main stem is known as Santa Anita Creek, which extends another 10 miles (16 km) northwards into the San Gabriel Mountains where the source, or headwaters, of the river are found.
The Chino Hills are a mountain range on the border of Orange, Los Angeles, and San Bernardino counties, California, with a small portion in Riverside County. The Chino Hills State Park preserves open space and habitat in them.
The San Gabriel River is a mostly urban waterway flowing 58 miles (93 km) southward through Los Angeles and Orange Counties, California in the United States. It is the central of three major rivers draining the Greater Los Angeles Area, the others being the Los Angeles River and Santa Ana River. The river's watershed stretches from the rugged San Gabriel Mountains to the heavily developed San Gabriel Valley and a significant part of the Los Angeles coastal plain, emptying into the Pacific Ocean between the cities of Long Beach and Seal Beach.
Mount San Antonio, colloquially referred to as Mount Baldy or Old Baldy, is a 10,066 ft (3,068 m) peak in the San Gabriel Mountains in Los Angeles County, California. Lying within the San Gabriel Mountains National Monument and Angeles National Forest, it is the high point of the range, the county, and the Los Angeles metropolitan area. Mount San Antonio's sometimes snow-capped peaks are visible on clear days and dominate the view of the Los Angeles Basin skyline. The summit and a subsidiary peak to the west form a double-peaked high point of a steep-sided east-west ridge. The summit is accessible via a number of connecting ridges along hiking trails from the north, east, south and southwest.
The Arroyo Seco, meaning "dry stream" in Spanish, is a 24.9-mile-long (40.1 km) seasonal river, canyon, watershed, and cultural area in Los Angeles County, California. The area was explored by Gaspar de Portolà who named the stream Arroyo Seco as this canyon had the least water of any he had seen. During this exploration he met the Chief Hahamog-na (Hahamonga) of the Tongva Indians.
The Los Angeles flood of 1938 was one of the largest floods in the history of Los Angeles, Orange, and Riverside Counties in southern California. The flood was caused by two Pacific storms that swept across the Los Angeles Basin in February-March 1938 and generated almost one year's worth of precipitation in just a few days. Between 113–115 people were killed by the flooding. The Los Angeles, San Gabriel, and Santa Ana Rivers burst their banks, inundating much of the coastal plain, the San Fernando and San Gabriel Valleys, and the Inland Empire. Flood control structures spared parts of Los Angeles County from destruction, while Orange and Riverside Counties experienced more damage.
The Sierra Madre Dam is a dam on Little Santa Anita Creek, at the mouth of Little Santa Anita Canyon, in Los Angeles County, California. It is in the San Gabriel Mountains, south of the Angeles National Forest, on the northern border of Sierra Madre.
San Diego Creek is a 16-mile (26 km) urban waterway flowing into Upper Newport Bay in Orange County, California in the United States. Its watershed covers 112.2 square miles (291 km2) in parts of eight cities, including Irvine, Tustin, and Costa Mesa. From its headwaters in Laguna Woods the creek flows northwest to its confluence with Peters Canyon Wash, where it turns abruptly southwest towards the bay. Most of the creek has been converted to a concrete flood control channel, but it also provides important aquatic and riparian habitat along its course and its tidal estuary.
Coyote Creek is a principal tributary of the San Gabriel River in northwest Orange County, southeast Los Angeles County, and southwest Riverside County, California. It drains a land area of roughly 41.3 square miles (107 km2) covering five major cities, including Brea, Buena Park, Fullerton, La Habra, and La Palma. Some major tributaries of the creek in the highly urbanized watershed include Brea Creek, Fullerton Creek, and Carbon Creek. The mostly flat creek basin is separated by a series of low mountains, and is bounded by several small mountain ranges, including the Chino Hills, Puente Hills and West Coyote Hills.
Brea Creek is one of four principal tributaries of Coyote Creek, which is a lower tributary of the San Gabriel River. It drains parts of Orange, Riverside and San Bernardino counties in the southern part of the U.S. state of California. The creek flows 11.7 miles (18.8 km) from the cities of Brea and Anaheim to Whittier, where its mouth is on the left bank of Coyote Creek, at a point 481 feet (147 m) lower in elevation.
Mount Baldy or Mount Baldy Village, formerly Camp Baynham and Camp Baldy, is an unincorporated community in the San Gabriel Mountains, in San Bernardino County near the eastern border of Los Angeles County, in Southern California. It is located below Mount San Antonio, commonly known as "Mount Baldy", hence its name.
The Jemez River is a tributary of the Rio Grande in eastern Sandoval County, New Mexico, United States.
Santa Anita Creek is a 10.4-mile (16.7 km) long stream in Los Angeles County, California. It flows southwards from its headwaters in the south ridge of the San Gabriel Mountains, to form the beginnings of the Rio Hondo near Irwindale.
Carbon Canyon Dam is a dam at the northern edge of Orange County, California. The dam is approximately 4 miles (6.4 km) east of the city of Brea and approximately 12 miles (19 km) north of the city of Santa Ana. The drainage area above the dam is 19.3 square miles (50 km2) and is encompassed entirely within the Puente and Chino Hills. The Carbon Canyon Creek flows in a generally southwesterly direction onto the coastal Orange County Plain, joins Coyote Creek, and then flows into the San Gabriel River.
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 Timoteo Creek is a stream in Riverside and San Bernardino counties in southern California, United States. A tributary of the Santa Ana River, it flows through San Timoteo Canyon. San Timoteo Creek has a drainage basin of about 125 square miles (320 km2). The creek receives most of its water from headwater tributaries flowing from the San Bernardino Mountains near Cherry Valley, as well as Yucaipa Creek, which flows from Live Oak Canyon.
