Arroyo Seco is a significant natural and cultural feature of Los Angeles, California, USA. It is a seasonal river and stream that extends approximately 24 miles from the San Gabriel Mountains to its confluence with the Los Angeles River near downtown Los Angeles. Many of Los Angeles' oldest and most historic neighborhoods, such as Pasadena and Highland Park, are located along the Arroyo Seco.
Arroyo Seco, in Spanish, means "dry stream". While it is mostly dry and paved over for much of the year, during heavy rain, the watercourses can fill dramatically.
The area around the Arroyo Seco includes a wide variety of habitats, including chaparral, oak woodland, riparian woodland, and sage scrub. It is home to various species of wildlife and serves as a critical wildlife corridor.
In addition to its natural significance, Arroyo Seco has significant historical and cultural importance. It has been inhabited since prehistoric times and was a key part of the early development of the Los Angeles area. Several parks and bike trails are situated along the Arroyo Seco, such as Arroyo Seco Park and bike path, and it is a popular location for recreational activities.
Moreover, the iconic Rose Bowl Stadium and Brookside Golf Course are located within the Arroyo Seco in Pasadena. There also exist several iconic bridges like Colorado Street Bridge and Devil's Gate Dam.
The Arroyo Seco is also a significant focus of ongoing efforts to restore and preserve the natural habitats and cultural heritage of the Los Angeles area. The Arroyo Seco Foundation is an organization dedicated to the protection and restoration of the river.