Tijuana River Estuary Trail Professional Review and Guide
"The isolated, perennially neglected Border Field State Park, accessible via the partially paved and sometimes closed Monument Road, lies at an interesting geographical spot, the extreme southwest corner of the lower 48 states. A picnic area atop a low coastal terrace there offers a superb view of the Coronado Islands, Point Loma, and the downtown San Diego skyline, which is bisected by the Coronado Bridge. Along the border fence, a stone monument dating from 1851 commemorates the first point at which the boundary of the U.S. and Mexico was staked, after the 1848 Treaty of Guadalupe Hidalgo. South of the border fence, the densely packed playas section of Tijuana stretches for miles, in complete contrast to the open space just north of the border fence."