BEACH MOUNTAINS. The Beach Mountains are located two miles northwest of Van Horn in southwestern Culberson County (with their center at 31°08' N, 104°51' W). Their highest elevation is 5,827 feet above sea level. The mountains are a domed and faulted block of Ordovician and Cambrian rocks, some 500 million years old; Precambrian rocks more than 570 million years old are found on their western flanks. The Beach Mountains, along with the Baylor and Sierra Diablo Mountains, form an uplifted block along the western edge of a broad valley of salt flats. They are steep and rocky and surfaced by shallow, stony soil that supports live oaks, piñons, junipers, and grasses. The mountains are named for J. H. Beach, a pioneer settler who arrived in Van Horn in 1886.