It is divided into two primary parts: Tijuana Slough National Wildlife Refuge on the north, and Border Field State Park in the south, but several other also jurisdictions own land within the Reserve boundary.

[3] This reserve is a good place for bird-watching since as many as 370 bird species, both native and migrating, use the area as a stopover or for breeding.

Guests can also take a walk on North and South McCoy trails, where they can access primary bird-watching areas and the mouth of Tijuana River, where it empties directly into Pacific Ocean.

[5] A $1.6 million grant was awarded by the California Integrated Waste Management Board to clean up the trash and debris that has collected on the Tijuana River Valley and Goat Canyon Estuary.

To help with the cleanup of Los Sauces Park, Mexico's Environment Ministry (SEMARNAT) has donated materials and employed over 100 residents to replace the wild undergrowth with plants native to the area.