San Gabriel River (California)

San Gabriel RiverSan GabrielSan Gabriel CanyonEast ForkMission Creek (San Gabriel River)San Gabriel CanonSan Gabriel River Watershed
The San Gabriel River is a mostly urban waterway flowing 58 mi southward through Los Angeles and Orange Counties, California in the United States.wikipedia
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San Gabriel Valley

San GabrielValleyEast San Gabriel Valley
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.
The San Gabriel valley derives its name from the San Gabriel River that flows southward through the center of the valley, which itself was named for the Spanish Mission San Gabriel Arcángel originally built in the Whittier Narrows in 1771.

Los Angeles County, California

Los Angeles CountyLos AngelesCounty of Los Angeles
The San Gabriel River is a mostly urban waterway flowing 58 mi southward through Los Angeles and Orange Counties, California in the United States.
The Los Angeles River, Rio Hondo, the San Gabriel River and the Santa Clara River flow in Los Angeles County, while the primary mountain ranges are the Santa Monica Mountains and the San Gabriel Mountains.

Orange County, California

Orange CountyOrangeOrange County, CA
The San Gabriel River is a mostly urban waterway flowing 58 mi southward through Los Angeles and Orange Counties, California in the United States.
In the North, the San Gabriel River also briefly crosses into Orange County and exits into the Pacific on the Los Angeles-Orange County line between the cities of Long Beach and Seal Beach.

Los Angeles flood of 1938

19381938 flood1938 floods
Severe floods in 1914, 1934 and 1938 spurred Los Angeles County, and later the federal government to build a system of dams and debris basins, and to channelize much of the lower San Gabriel River with riprap or concrete banks.
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.

Santa Ana River

Santa AnaSanta Anna River
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.
In the northwest is the San Gabriel River, which empties into the Pacific at Long Beach.

Los Angeles River

Los AngelesL.A. RiverLA River
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 Rio Hondo (deep river) now serves as a distributary for the San Gabriel River to the east via the Whittier Narrows Reservoir.

Mount San Antonio

Mount BaldyMt. BaldyMount San Antonio ("Mount Baldy")
Elevations reach up to 10064 ft at Mount San Antonio (Mount Baldy), the highest point of the range.
The mountain's southern watershed drains into San Antonio Creek, the north side into Lytle Creek and the Fish Fork of the San Gabriel River.

East Fork San Gabriel River

East Fork
The East Fork, 17 mi long, is the largest headwater of the San Gabriel River; the U.S. Geological Survey considers it part of the main stem.
The East Fork is the largest headwater of the San Gabriel River in Los Angeles County, California.

West Fork San Gabriel River

West ForkWest Fork of the San Gabriel River Canyon
However, it is colloquially known as the "East Fork" to distinguish it from the West Fork of the San Gabriel.
The West Fork is one of two major streams, the other being the East Fork, that combine to form the San Gabriel River in Los Angeles County, California.

Cogswell Dam

Cogswell ReservoirCogswell
From its headwater the river quickly descends to the Cogswell Reservoir, where Devils Canyon Creek joins from the north.
Cogswell Dam is a rockfill dam on the West Fork of the San Gabriel River in Los Angeles County, California.

San Gabriel Dam

San Gabriel ReservoirSan Gabriel
The river receives Cattle Canyon, its biggest tributary and then turns sharply west, flowing past the Camp Williams Resort and a number of U.S. Forest Service and Los Angeles County fire fighting facilities, before flowing into San Gabriel Reservoir, where it joins the West Fork.
San Gabriel Dam is a rock-fill dam on the San Gabriel River in Los Angeles County, California, within the Angeles National Forest.

East Fork Road

After emerging from the Narrows the river continues flowing south through a somewhat more open valley, receiving several tributaries including Devil Gulch and Allison Gulch, before reaching Heaton Flat, a popular trailhead and the end of the East Fork Road, which parallels the lower section of the river.
East Fork Road, located in the San Gabriel Mountains above the city of Azusa, California, is a road that gives access from State Route 39 into East Fork and other small townships, including Camp Williams, and Julius Klein Conservation Fire Camp 19, a minor offender prisoner housing complex where "LACO fire personnel provide training, which prepares inmates to safely conduct wild land firefighting operations."

Morris Dam

Morris
The concrete gravity Morris Dam, just downstream, creates the 27800 acre feet Morris Reservoir.
Morris Dam (officially the Samuel B. Morris Dam) is a concrete gravity dam across the San Gabriel River in the U.S. state of California.

Azusa, California

AzusaAzusa, CACitrus Union High School
The river emerges from the San Gabriel Canyon at Azusa, a short distance below Morris Dam, where it reaches the wide and gently sloping alluvial plain of the San Gabriel Valley.
The place name "Azusa" dates to the Mexican Alta California era in the 19th century when Azusa was used to refer to the San Gabriel Valley and the San Gabriel River.

Bridge to Nowhere (San Gabriel Mountains)

Bridge to Nowhere
Near the lower end of the Narrows, the river passes under the Bridge to Nowhere, a 120 ft high arch bridge that was abandoned after the huge flood of 1938 washed out a highway under construction along the East Fork.
It spans the East Fork of the San Gabriel River and was meant to be part of a road connecting the San Gabriel Valley with Wrightwood.

Santa Fe Dam

Santa Fe ReservoirSanta FeSanta Fe Flood Control Basin
The usually dry riverbed then continues in a southwesterly direction, passing the ruins of the 1907 Puente Largo or "Great Bridge" that once carried Pacific Electric interurban trains, and under Interstate 210 into the flood control basin behind Santa Fe Dam.
Santa Fe Dam is a flood-control dam on the San Gabriel River located in Irwindale in Los Angeles County, California, United States.

San Gabriel Mountains

San GabrielSan Gabrielsmountains
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.
Melting snow and rain runoff on the south side of the San Gabriels' highest mountains give rise to its largest river, the San Gabriel River.

El Monte, California

El MonteEl Monte, CACalifornia (El Monte)
Shortly below Interstate 10 at El Monte, the river is joined from the east by Walnut Creek, which restores a small perennial flow.
The area, beside the San Gabriel River, was part of the homeland of the Tongva people for thousands of years.

Crystal Lake Recreation Area

Crystal LakeCrystal Lake (Los Angeles County)
The popular Crystal Lake Recreation Area in the upper North Fork includes the only natural lake in the San Gabriel Mountains.
The Recreation Area is located approximately 26 miles (42 km) north on Hwy. 39 heading out of Azusa, California at the headwaters of the north fork of the San Gabriel River at an elevation approximately 5,539 feet (1,688 m) above sea level.

Irwindale, California

Irwindale IrwindaleCalifornia (Irwindale)
Past the Santa Fe Dam – which when dry is used as the Santa Fe Dam Recreation Area – the river flows through Irwindale where it is the site of several major gravel quarries, which have operated in the San Gabriel Valley since the early 1900s to mine the rich alluvial sediments deposited by the river over millennia.
The Irwindale Event Center is also located in the city, as is the Santa Fe Dam Recreation Area near the San Gabriel River, a plant of the Miller Brewing Company, and a plant of the Huy Fong Foods sriracha sauce company.

Seal Beach, California

Seal BeachSeal Beach, CAAnaheim Landing
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.
Surfing locations in Seal Beach include the Seal Beach pier and the river-"Stingray Bay" (or Ray Bay—the surfer's nickname for the mouth of the San Gabriel River—the stingrays are attracted by the heated water from several upstream powerplants).

Santa Fe Dam Recreation Area

Santa Fe DamSanta Fe Dam Nature Center
Past the Santa Fe Dam – which when dry is used as the Santa Fe Dam Recreation Area – the river flows through Irwindale where it is the site of several major gravel quarries, which have operated in the San Gabriel Valley since the early 1900s to mine the rich alluvial sediments deposited by the river over millennia.
The dam is a flood-control dam on the San Gabriel River.

Whittier Narrows Dam

Whittier Narrows ReservoirWhittier Narrows
Here it is impounded by the Whittier Narrows Dam which also serves primarily for flood control.
Whittier Narrows Dam is a 56-foot (17 m) tall earth dam on the San Gabriel River and the smaller, parallel Rio Hondo.

Pico Rivera, California

Pico RiveraPico Rivera, CACity of Pico Rivera
It flows through Whittier and Pico Rivera and under the Interstate 5 to Downey, where the river becomes a concrete channel.
Situated on a rich alluvial plain between the Rio Hondo and the San Gabriel River, the area was once predominantly agricultural; but, at the end of WWII, the fast rising demand for homes lured builders to the attractive terrain.

Downey, California

DowneyDowney, CACalifornia (Downey)
It flows through Whittier and Pico Rivera and under the Interstate 5 to Downey, where the river becomes a concrete channel.
Its 300,000 acre stretched from the Santa Ana River on the east to the Old San Gabriel River (now the Rio Hondo and Los Angeles River) on the west, and from the mission highway (approximately Whittier Boulevard) on the north to the ocean on the south.