Arroyo Simi seen from Frontier Park.
|• location||Corriganville Park, Simi Valley|
|Merges with Arroyo Las Posas in Moorpark, discharges to the Pacific by Mugu Lagoon|
|Length||19 mi (31 km)|
|River system||Calleguas Creek|
|• left||Runkle Canyon- and Bus Canyon Creeks, and Erringer Drain|
|• right||Aaamos Canyon-, Dry Canyon-, Tapo Canyon-, Las Llajas Canyon-, and White Oak Creeks, and North Simi Drain|
The Arroyo Simi (Spanish for "Small Stream of Simi", 19-mile (31 km) westwards-running creek, running from the city of Simi Valley and crosses the valley from east to west, before entering the city of Moorpark. It originates at Corriganville Park by the Santa Susana Pass, and streams westwards into Moorpark where it merges with Arroyo Las Posas by Hitch Road. It extends for 12 miles (19 km) through the Simi Valley, and leaves the city limits by Oak Park at the western end Simi Valley, and continues for seven miles in Moorpark. It is a tributary to the Calleguas Creek, which enters the Pacific Ocean by its estuary at Mugu Lagoon by Naval Air Station Point Mugu. Besides an arroyo, it has been described as a channel, waterway, river, drain, wash, and stream. Arroyo Simi drains an area of 343 square miles in southern Ventura County. In its natural state, it is an ephemeral creek, which is only seasonally filled during winter time and periods of heavy rain. Today it is for the most part a concrete lined water drain that flows year round. Tributaries to the Arroyo Simi includes Aaamos Canyon-, Sycamore-, Dry Canyon-, Tapo Canyon-, Las Llajas Canyon-, White Oak-, Runkle Canyon-, and Bus Canyon Creeks, as well as the Erringer Road- and North Simi Drains.sometimes also referred to as Simi Creek) is a
Arroyo Simi Greenway is an ongoing construction project by the City of Simi Valley in order to increase the recreational use of its river parkways. The project includes new paved hiking- and biking trails along the Arroyo Simi, exhibit signs, sixteen new trail entries, and more.The area is administrated as the Arroyo Simi Bike Path by the Rancho Simi Recreation and Park District (RSRPD). It is home to native flora, fish, and avifauna. It is home to fish species such as the brown bullhead, green sunfish, bluntnose minnow, and mosquitofish. It is an important habitat for various species of freshwater-nesting birds in the Simi Valley. Some of the species include the great blue heron, white-faced ibis, black-crowned night heron, green heron, black-necked stilt, great egret, snowy egret, belted kingfisher, black phoebe, killdeer, common yellowthroat, greater yellowlegs, American coot, and mallard.
Ventura County is a county in the southern part of the U.S. state of California. As of the 2010 census, the population was 823,318. The largest city is Oxnard, and the county seat is the city of Ventura.
The Los Angeles River is a major river in Los Angeles County, California. Its headwaters are in the Simi Hills and Santa Susana Mountains, and it flows nearly 51 miles (82 km) from Canoga Park through the San Fernando Valley, Downtown Los Angeles, and the Gateway Cities to its mouth in Long Beach. While the river was once free-flowing and frequently flooding, forming alluvial flood plains along its banks, it is currently notable for flowing through a concrete channel on a fixed course, which was built after a series of devastating floods in the early 20th century.
State Route 118 is a state highway in the U.S. state of California that runs west to east through Ventura and Los Angeles counties. It travels from State Route 126 at the eastern edge of Ventura immediately northwest of Saticoy, then through Saticoy, in Ventura County east to Interstate 210 near Lake View Terrace in Los Angeles. SR 118 crosses the Santa Susana Pass and the northern rim of the San Fernando Valley along its route.
The Simi Hills are a low rocky mountain range of the Transverse Ranges in eastern Ventura County and western Los Angeles County, of southern California, United States.
The Santa Monica Mountains National Recreation Area is a United States national recreation area containing many individual parks and open space preserves, located primarily in the Santa Monica Mountains of Southern California. The SMMNRA is in the greater Los Angeles region, with two thirds of the parklands in northwest Los Angeles County, and the remaining third, including a Simi Hills extension, in southeastern Ventura County.
The city of Simi Valley, in the eponymous valley, is in the southeast corner of Ventura County, California, United States, 40 miles (65 km) from downtown Los Angeles, making it part of the Greater Los Angeles Area. The city sits next to Thousand Oaks, Moorpark, and Chatsworth. The city's 2019 population has been estimated at 125,613, up from 124,243 in 2010. The city of Simi Valley is surrounded by the Santa Susana Mountain range and the Simi Hills, west of the San Fernando Valley, and northeast of the Conejo Valley. It grew as a commuter bedroom community for the cities in the Los Angeles area and the San Fernando Valley when a freeway was built over the Santa Susana Pass.
Simi Valley is a synclinal valley in Southern California in the United States. It is an enclosed or hidden valley surrounded by mountains and hills. It is connected to the San Fernando Valley to the east by the Santa Susana Pass and the 118 freeway, and in the west the narrows of the Arroyo Simi and the Reagan Freeway connect to Moorpark and Ventura, California. The relatively flat bottom of the valley contains soils formed from shales, sandstones, and conglomerates eroded from the surrounding hills of the Santa Susana Mountains to the north, which separate Simi Valley from the Santa Clara River Valley, and the Simi Hills.
The Los Angeles River bicycle path is a Class I bicycle and pedestrian path in the Greater Los Angeles area running from north to east along the Los Angeles River through Griffith Park in an area known as the Glendale Narrows. The 7.4 mile section of bikeway through the Glendale Narrows is known as the Elysian Valley Bicycle & Pedestrian Path. The bike path also runs from the city of Vernon to Long Beach, California. This section is referred to as the Los Angeles River Bikeway.
San Francisquito Creek, in Los Angeles County, is a tributary stream of the Santa Clara River. It drains the south facing slopes of the Sierra Pelona Mountains of the San Gabriel Mountains within the Transverse Range of California, United States.
The Glendale Narrows is a scenic 11 mile section of the Los Angeles River in the Northeast Los Angeles region of Los Angeles County, California.
Alamitos Creek or Los Alamitos Creek is a 7.7-mile-long (12.4 km) creek in San Jose, California, which becomes the Guadalupe River when it exits Lake Almaden and joins Guadalupe Creek. Los Alamitos Creek is located in Almaden Valley and originates from the Los Capitancillos Ridge and the Santa Cruz Mountains. This creek flows through the Valley's Guadalupe Watershed, which is owned by the Santa Clara Valley Water District. The creek flows in a generally northwesterly direction after rounding the Los Capitancillos Ridge and the town of New Almaden, in the southwest corner, before ambling along the Santa Teresa Hills on northeast side of the Almaden Valley. Its environment has some relatively undisturbed areas and considerable lengths of suburban residential character. Originally called Arroyo de los Alamitos, the creek's name is derived from "little poplar", "alamo" being the Spanish word for "poplar" or "cottonwood".
The Chatsworth Nature Preserve (CNP) is a 1,325-acre (536 ha) open-space preserve located in the northwest corner of the San Fernando Valley in Los Angeles, California, United States. The preserve contains oak woodlands, savanna, riparian areas, grassland, vernal pools, and an Ecology Pond, all of which support more than 200 bird species and numerous mammals, amphibians and reptiles.
Las Llajas Canyon within the Marr Ranch Parkland contains the 1920s residential subdivision called Marrland and the surrounding open space area administrated by the Rancho Simi Recreation and Park District (RSRPD) and is located in northeastern Simi Valley, CA. The Las Llajas and nearby Chivo Canyons are parts of the Marr Ranch Parkland, Marrland residential subdivision, and are situated at the foothills on the south side of the Santa Susana Mountains. It contains panoramic mountain and city views, large oak trees, stream and stream bed, rock formations, barren hillsides and rolling hills. The canyon is visited for recreational activities as rock climbing, biking, hiking, wildlife observation, photography, running, picnicking, and horseback riding. It has smooth footing with many sandy sections and a green creek-bed. It also includes a 46-acre dam that was intended for creation a recreational lake in the 1970s. Now called the Las Llajas Canyon Debris Basin.
Tierra Rejada Park is a 150-acre park located in the northern Simi Hills foothills, in southwestern Simi Valley city near Moorpark, in Ventura County, California.
Bridle Path is a community in the southwestern area of the City of Simi Valley, in Ventura County, Southern California.
Arroyo Conejo is the longest creek in the Conejo Valley, sprawling over the cities of Thousand Oaks and Camarillo, and the communities of Newbury Park, Casa Conejo and Santa Rosa Valley. Arroyo Conejo is the primary drainage for the City of Thousand Oaks. Its watershed covers 57 square miles (150 km2) of which 43 square miles (110 km2) are in the Conejo Valley and 14 square miles (36 km2) in the Santa Rosa Valley.
Hill Canyon is a deep canyon in the western Simi Hills and within northern Newbury Park and Thousand Oaks, in Ventura County, southern California.
Ventu Park Open Space is a 141-acre open space area in Newbury Park, California. Its primary features are the Rosewood Trail leading to Angel Vista, a 1,603 ft peak in the Santa Monica Mountains. Parking for the Rosewood Trail is located at the Stagecoach Inn Park, across Lynn Road from the primary trailhead. The Rosewood Trail begins with oak woodland and crosses a creek at the canyon floor, before climbing up towards the steep Angel Vista Point. There are 360-degree panoramic views of the Conejo Valley, the Oxnard Plain, the California Channel Islands, Pacific Ocean, Point Mugu, Hidden Valley, as well as the Santa Monica-, Santa Susana- and Topa Topa Mountains.
Calleguas Creek is the terminus of a river system in Ventura County, California. It drains the Calleguas Creek Watershed, an area 30 miles long and 14 miles wide, which includes Simi Valley, Moorpark, Camarillo and a large portion of Thousand Oaks. Tributaries include Arroyo Simi, Arroyo Santa Rosa, Revolon Slough and Arroyo Conejo. It discharges into the Pacific Ocean, the Santa Barbara Channel, at Mugu Lagoon on Naval Base Ventura County, just north of Point Mugu, where the Santa Monica Mountains meet the ocean, marking the southern/eastern boundary of the Oxnard Plain.