Cooke followed the Kearny route westward along the Gila to Yuma Crossing linking there with the Sonora Road to California established by Juan Bautista de Anza in 1776, establishing the first southern wagon road from New Mexico to California.
Cooke followed the Kearny route westward along the Gila to Yuma Crossing linking there with the Sonora Road to California established by Juan Bautista de Anza in 1776 and reestablished by Mexico from 1828. This established the first southern wagon road from New Mexico to California.