The Tijuana River National Estuarine Research Reserve is one of 30 Reserves in the United States. 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 with your students! There are 3 types of fieldtrips available depending on the grade level of your students.