The Otay River is a river located in southern California, primarily flowing through San Diego County. It originates in the Cuyamaca Mountains and travels approximately 30 miles before emptying into San Diego Bay. The river's watershed covers an area of about 200 square miles, providing important habitat for various plant and animal species. The Otay River is significant for its role in local ecology and water management. It supports recreational activities such as hiking and birdwatching along its banks. Additionally, the river is part of the San Diego River Park Foundation efforts to preserve and restore natural habitats in the region.