Tijuana Slough provides critical habitat for the federally listed endangered California least tern, light-footed rail and least Bell's vireo, as well as the salt marsh bird's-beak, an endangered plant species.
Imperial Beach is a beach city in San Diego County, California, with a population of 26,137 as of the 2020 United States census. It is in the South Bay area of San Diego County, 14.1 miles (22.7 km) south of downtown San Diego and 5 miles (8 km) northwest of downtown Tijuana, Mexico. Imperial Beach is the southernmost city in California and the West Coast of the United States.