Tijuana River National Estuarine Research Reserve 301 Caspian Way, Imperial Beach, CA91932 Tijuana River National Estuarine Research Reserve, more than 2,500 acres, was officially designated a national wildlife…More refuge in 1980 and a research reserve in 1982. Here the Tijuana River empties into the ocean. A museum at the end of Caspian Drive details the area's biodiversity and acts as a starting point to miles of trails. The reserves make up 2/3 of San Diego's County's biodiversity in what is the most biodiverse county in the continental United States. Visit the website for more information.
Border Field State Park 1500 Monument Rd, San Diego, CA92154 Border Field State Park is considered a part of the Tijuana National Estuarine Research Reserve, one of 27 estuarine…More research reserves in the country designated by the National Oceanic and Atmospheric Administration. The park runs to the border where it meets Friendship Park and Monument Mesa, an international boundary marker placed here in 1851 to signal the start of the U.S. - Mexico border. Directly across the border is the Playas de Tijuana Bull Ring. Road access has been obstructed by state financial issues and other issues for the last two years, but bike and walking trails are still available. To access Border Field State Park, take Hollister Street until it ends and make a right at Monument Road.