Socorro Road (FM 258), which runs from Ysleta to Socorro to San Elizario, is the designated Mission Trail. This nine-mile route represents a segment of El Camino Real de Tierra Adentro (Royal Road of the Interior), the historic trail that extended from Mexico City to Santa Fe, and linked the missions,-agricultural communites, haciendas(landed estates) and presidios (military forts) to distant trade and supply routes. It is thr oldest and once the longest road in North America, and was designated as a National Historic Trail in 2000.
