San Mateo Creek Watershed

Most of San Mateo Creek and its outlet to the Pacific Ocean, at San Onofre State Beach, are actually located in San Diego County. The San Mateo Creek Watershed within Orange County is largely unincorporated territory under the jurisdiction of the County. It covers approximately 19.16 square miles of southeastern Orange County including portions of the City of San Clemente in its downstream-most area. The Donna O’Neill Land Conservancy is located in the southwestern side of the watershed at Rancho Mission Viejo.

For more information about this watershed contact OC Watersheds

Watershed and City Boundary Map

Additional information about the San Mateo Creek Watershed such as land use, drainage and elevations can be accessed by clicking the link below.