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. This range lies in, and is surrounded by, the Angeles National Forest, with the San Andreas Fault as the northern border of the range.
The Feather River is the principal tributary of the Sacramento River, in the Sacramento Valley of Northern California. The river's main stem is about 73 miles (117 km) long. Its length to its most distant headwater tributary is just over 210 miles (340 km). The main stem Feather River begins in Lake Oroville, where its four long tributary forks join together—the South Fork, Middle Fork, North Fork, and West Branch Feather Rivers. These and other tributaries drain part of the northern Sierra Nevada, and the extreme southern Cascades, as well as a small portion of the Sacramento Valley. The total drainage basin is about 6,200 square miles (16,000 km2), with approximately 3,604 square miles (9,330 km2) above Lake Oroville.
Catoctin Creek is a 14.1-mile-long (22.7 km) tributary of the Potomac River in Loudoun County, Virginia, with a watershed of 59,000 acres (240 km2). Agricultural lands make up 67 percent and forests 30 percent of Catoctin Creek's watershed. It is the main drainage system for the northern Loudoun Valley, including all of the Catoctin Valley.
The Chowchilla River is a river in central California, United States and a minor tributary of the San Joaquin River. It flows for 54.2 miles (87.2 km) from the western side of the Sierra Nevada Range to the San Joaquin River system in the San Joaquin Valley.
Tujunga Wash is a 13.0-mile-long (20.9 km) stream in Los Angeles County, California. It is a tributary of the Los Angeles River, providing about a fifth of its flow, and drains about 225 square miles (580 km2). It is called a wash because it is usually dry, especially the lower reaches, only carrying significant flows during and after storms, which usually only occur between November and April.
Big Pine Creek is a 12.1-mile-long (19.5 km) stream in Inyo County of eastern California, in the western United States. It flows from the eastern Sierra Nevada down to the Owens Valley, where it is a major tributary of the Owens River near Big Pine.
Goose Creek is a 53.9-mile-long (86.7 km) tributary of the Potomac River in Fauquier and Loudoun counties in northern Virginia. It comprises the principal drainage system for the Loudoun Valley.
The Angeles Forest Highway is a road over the San Gabriel Mountains in Los Angeles County, California. It connects the Los Angeles Basin with the Antelope Valley and western Mojave Desert. The highway is also known as County Road N-3 or FH-59 or the Palmdale cutoff; the route numbers are unsigned, but noted on many maps. It is about 25 miles (40 km) long.
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.
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.
The South Fork Eel River is the largest tributary of the Eel River in north-central California in the United States. The river flows 105 miles (169 km) north from Laytonville to Dyerville/Founders' Grove where it joins the Eel River. The South Fork drains a long and narrow portion of the Coast Range of California in parts of Mendocino and Humboldt counties. U.S. Route 101 follows the river for much of its length.
The East Branch South Fork Eel River, a tributary of the South Fork Eel River, is formed by the confluence of Cruso Cabin Creek and Elkhorn Creek, in Mendocino County in the U.S. state of California. The river is roughly 25 miles (40 km) long, meandering west to its confluence with the South Fork Eel at Benbow Lake State Recreation Area. Major tributaries of the East Branch include Buck Mountain Creek, Squaw Creek, Rays Creek, and Tom Long Creek. The river flows west, turns north, and flows west again, through rugged terrain in the Coast Range of California. The East Branch is the South Fork Eel's largest tributary.
The South Fork Merced River is the largest tributary of the Merced River. Most of the river flows within Yosemite National Park in the Sierra Nevada of California. The river is 43 miles (69 km) long, and its drainage basin covers about 240 square miles (620 km2), of which 109 square miles (280 km2) are in the national park. The average flow at the mouth is 356 cubic feet per second (10.1 m3/s).
City Creek is a 7.5-mile (12.1 km) tributary of the Santa Ana River in western San Bernardino County in the U.S. state of California. Its watershed drains about 19.6 square miles (51 km2) on the southwest slopes of the San Bernardino Mountains. Although short, the creek stretches about 12 miles (19 km) to its farthest source.
The Rice Fork is a 22.7-mile-long (36.5 km) tributary of the Eel River in Lake County, California. The Rice Fork begins on the upper northwest side of Goat Mountain, on the Colusa-Lake County line, at an elevation of over 6,000 feet (1,800 m). It quickly descends the steep western slope of the mountain, then bends northward, and flows northwesterly down a narrow winding steep walled canyon for about 18 miles (29 km), crossing two forest roads and adding many tributaries, ending its journey at the southern tip of Lake Pillsbury, at a varied elevation around 1,800 feet (550 m), depending on the lake level. Before the construction of Scott Dam in the 1920s, which formed Lake Pillsbury, the Rice Fork ran directly into the Eel River. It is one of Lake County's longest streams.
Big Tujunga Dam is a 244-foot (74 m)-high concrete arch dam in Los Angeles County, California, spanning Big Tujunga Canyon northeast of Sunland, in the foothills of the San Gabriel Mountains. Completed in 1931, it provides flood control and groundwater recharge for the San Fernando Valley.
Mill Creek is a mountain stream in the Angeles National Forest of Los Angeles County, California, and a major tributary of Big Tujunga Creek. It flows in a southwesterly direction for about 8 miles (13 km) from near Mill Creek Summit in the San Gabriel Mountains to join Big Tujunga Creek near the village of Hidden Springs. The Mill Creek valley provides a major part of the route of Angeles Forest Highway. Mill Creek Summit, 4,910 feet (1,500 m), is the highest point along the road.
The Matilija Wilderness is a 29,207-acre (11,820 ha) wilderness area in Ventura and Santa Barbara Counties, Southern California. It is managed by the U.S. Forest Service, being situated within the Ojai Ranger District of the Los Padres National Forest. It is located adjacent to the Dick Smith Wilderness to the northwest and the Sespe Wilderness to the northeast, although it is much smaller than either one. The Matilija Wilderness was established in 1992 in part to protect California condor habitat.
