Arroyo Seco is a river located in southern California, flowing through the San Gabriel Mountains and into the Los Angeles area. It is known for its scenic beauty and recreational opportunities, including hiking, biking, and picnicking along its banks. The river is also an important ecological habitat for various plant and animal species. The Arroyo Seco watershed covers approximately 30 square miles and includes several tributaries. It plays a crucial role in managing stormwater and providing water resources for the surrounding communities. Efforts have been made to restore and preserve the river's natural environment, enhancing its value for both wildlife and residents.