We preserve, protect, and manage the natural and cultural resources of the Tijuana River Estuary by creating opportunities for education and research while promoting public access for recreation throughout the Reserve. Come experience the beauty and wonder of this natural wetland habitat.

The Tijuana Estuary is the largest coastal wetland in Southern California and it is located on the international border between the U.S. and Mexico. The estuary is primarily a shallow water habitat, though it is often termed an "intermittent estuary," as it is subjected to extreme changes in streamflow at different times of the year.

The Tijuana River Estuary (or Tijuana Estuary) is an intertidal coastal wetland at the mouth of the Tijuana River in San Diego County, California, United States, bordering Tijuana, Baja California, Mexico.

Tijuana River National Estuarine Research Reserve (TRNERR) preserves, protects, and manages the natural and cultural resources of the Tijuana Estuary.

Plan your visit to the Tijuana River National Estuarine Research Reserve – “A Wetland of International Importance.” The Visitor Center offers a variety of hands-on, interactive activities for all ages as well as a collection of videos (including videos in …

This reserve preserves one of the largest remaining examples of coastal wetland habitats in southern California. Located in Imperial Beach, CA, the reserve is situated in a highly urbanized location and is immediately adjacent to Tijuana, Mexico.

Tijuana River National Estuarine Research Reserve is a natural reserve in Imperial Beach, California, and San Ysidro, San Diego. It encompasses the Tijuana River Estuary, located on the Mexico–United States border. It is divided into two parts: Tijuana Slough National Wildlife Refuge on the north, and Border Field State Park in the south.

Tijuana Slough National Wildlife Refuge is 1,072 acres in size and is located where the Tijuana River meets the Pacific Ocean, also called the Tijuana Estuary. Be sure to spend some time out discovering the trails to take in the incredible views and birds that soar across the estuary.

The Tijuana Estuary is one of the few salt marshes remaining in Southern California. 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.

The Tijuana River Estuary is a vital natural ecosystem characterized by its rich wetlands. Learn about the estuary's challenges of sea level rise and topographical constraints and about public access to trails.