The Santa Margarita River is a river located in southern California, flowing through Riverside County and San Diego County. It stretches approximately 60 miles and is known for its scenic beauty and diverse ecosystems. The river is a vital water source for local communities and supports various wildlife habitats. The river's watershed includes several tributaries and is part of the larger San Luis Rey River basin. The Santa Margarita River is popular for recreational activities such as hiking, fishing, and kayaking, attracting nature enthusiasts and outdoor adventurers throughout the year.