The Tijuana River Watershed covers 1,750 square miles – three-fourths lies in Mexico and includes the cities of Tijuana and Tecate.

The Tijuana River is an intermittent river, 120 mi long, near the Pacific coast of northern Baja California state in northwestern Mexico and Southern California in the western United States.

The Tijuana River Estuary Visitor Center is an Orchid Award winning facility designed by venerated San Diego architect Rob Quigley. Hot off the press! A large portion of the watershed (approximately 75%) is within Mexico and encompass the densely urbanized City of Tijuana,Mexico. But the watershed drains out into the Tijuana River estuary on the U.S. side of the border, where the river’s mouth meets the Pacific Ocean. Click link above to read more, purchase the book, or download a free copy.

The Tijuana Estuary is one of the few salt marshes remaining in Southern California. The Tijuana River Watershed is a large binational watershed of approximately 1,750 square miles that lies across the California - Mexico border.

The Tijuana River National Estuarine Research Reserve (NERR), with support from a NOAA Marine Debris Program Removal Grant, worked to remove debris from the Tijuana River NERR and prevent further debris from washing down the Tijuana River Watershed from Mexico. 40 Years of Restoration at Tijuana Estuary: Lessons Learned.

We can all do our part to protect our watershed by not allowing harmful pollutants like motor oil, fertilizer, and plastic trash to enter storm drains and flow into the estuary … The site is an essential breeding, feeding and nesting ground and key stopover point on the Pacific Flyway for over 370 species of migratory and native birds, including six endangered species.

Inside are nature exhibits, audio-visual equipped classrooms and community rooms, a library and the Clapper Rail's Nest Gift Shop.

Check out the newest book on the history of habitat restoration in and around the Tijuana Estuary, by Chris Nordby. The Tijuana Estuary Visitor Center (part of the Tijuana River National Estuarine Research Reserve) is located at 3rd Street and Caspian Way in Imperial Beach, the most southwestern city in the United States. The Tijuana River Estuary is one of the few salt marshes remaining in Southern California, where over 90% of wetland habitat has been lost to development. The Tijuana River Estuary is an intertidal coastal wetland at the mouth of the Tijuana River in San Diego County, California, in the United States bordering Tijuana, Baja California, Mexico.It is the location of the Tijuana River National Estuarine Research Reserve, Tijuana Slough National Wildlife Refuge, and Border Field State Park.The estuary is a shallow water habitat.