Warner's Ranch, near Warner Springs, California, was notable as a way station for large numbers of emigrants on the Southern Trail from 1849 to 1861, as it was a stop on both the Gila River Trail and the Butterfield Overland Mail stagecoach line (1859-1861). It also operated as a pioneering cattle ranch.
When California became part of the United States, new obligations for taxes were applied to the Cupeño. Many of them worked on Warner's ranch, which had a bad reputation for severe treatment of Indians. In 1851, at the beginning of the Garra Revolt, an uprising by the local Cupeño tribe under Antonio Garra, Warner was attacked at his ranch. He sent his family to Los Angeles. Some of the ranch buildings were burned, but Warner continued to operate it, until his grant was challenged by a former claimant.
Warner's Ranch was a stop on the San Antonio-San Diego Mail Line in 1857 and the Butterfield Overland Mail stagecoach line between 1858 and 1860. It was linked to San Diego by the San Diego - Fort Yuma mail route via the road through Santa Isabel to San Diego. Travelers rested here along their journey, after the trip through the desert.