The trail is a combination of a network of trails first established by indigenous people and later used by Spanish explorers, trappers, and traders with the
Ute and other indigenous tribes. The eastern parts of what became called the Old Spanish Trail, including southwest
Colorado and southeast
Utah, were explored by
Juan Maria de Rivera in 1765.
Franciscan missionaries
Francisco Atanasio Domínguez and
Silvestre Vélez de Escalante unsuccessfully attempted the trip to
California, which was just being settled, leaving Santa Fe in 1776 and making it to the
Great Basin near
Utah Lake before returning via the
Arizona Strip. Other expeditions, under another Franciscan missionary,
Francisco Garcés, and Captain
Juan Bautista de Anza, explored and traded in the southern part of the region. They found shorter and less arduous routes through the mountains and deserts that connected Sonora to New Mexico and California, but these did not become part of the Old Spanish Trail, with the exception of some of the paths through the
Mojave Desert. The
Mohave Trail was first traveled by Garcés from the
Mohave villages on the
Colorado River westward across the Mojave Desert, between desert springs, until he turned northwestward to the
Old Tejon Pass into the
San Joaquin Valley, looking for a route to Monterey. Garcés returned to the Colorado River by following the whole length of the Mohave Trail from the
San Bernardino Valley, over the
San Bernardino Mountains at
Monument Peak, down the
Mojave River and eastward to the Colorado River. This same trail was used by the first Americans to reach California by land, via the expedition led by
Jedediah Smith in November 1826. The Mojave desert section of the Mohave Trail is now a 4WD trail called the
Mojave Road. A route linking
New Mexico to
California, combining information from many explorers, was opened in 1829-30 when
Santa Fe merchant
Antonio Armijo led a trade party of 60 men and a caravan of mules to Alta California. Armijo's group blazed a trade route using a network of indigenous routes, incorporating parts of Jedediah Smith's routes of 1826 and 1827, and Rafael Rivera's route of 1828 to the
San Gabriel Mission through the Mojave along the
Mojave River. Armijo documented his route in a report to the governor, and this was published by the Mexican government in June 1830. After this date, traders generally used the trail for a single, annual round trip. Word spread about Armijo's successful trade expedition, and some commerce began between Santa Fe and Los Angeles. However, in 1830, due to resumed hostilities with the
Navajo, the Armijo route west to the Colorado River
Crossing of the Fathers was not practical. A new route north of the river had to be found, which used the trails of the fur traders and trappers of New Mexico through the lands of the Ute. This route ran northwest to the Colorado and
Green rivers, then crossed over to the
Sevier River, which it followed until crossing westward over mountains to the vicinity of
Parowan, Utah. It passed southward to the Santa Clara River, linking up with Armijo's route to California. This commerce usually consisted of one mule pack train from Santa Fe with 20 to 200 members, with roughly twice as many mules, bringing New Mexican goods hand-woven by Indians, such as serapes and blankets, to California. California had many horses and mules, many growing wild, with no local market, which were readily traded for hand-woven Indian products. Usually two blankets were traded for one horse; more blankets were usually required for a mule, which were considered hardier. California had almost no wool-processing industry and few weavers, so woven products were a welcome commodity. The trading party usually left New Mexico in early November to take advantage of winter rains to cross the deserts on the trail and would arrive in California in early February. The return party would usually leave California for New Mexico in early April to get over the trail before the water holes dried up and the melting snow raised the rivers too high. The return party often drove several hundred to a few thousand horses and mules. Low-scale emigration from New Mexico to California used parts of the trail in the late 1830s when the trapping trade began to die. New Mexicans migrated to settle in Alta California by this route: some first settled in
Politana then established the twin settlements of
Agua Mansa and
La Placita on the
Santa Ana River the first towns in what became
San Bernardino and
Riverside counties. The family of Antonio Armijo moved to Alta California, where his father acquired the
Rancho Tolenas. A number of Americans, most naturalized Mexican citizens in New Mexico, and formerly in the California trade over the Old Spanish Trail or in the fur trade, settled in Alta California. Several became influential residents in later years, such as
Louis Rubidoux,
John A. Rowland,
William Workman,
Benjamin Davis Wilson, and
William Wolfskill. The trail was also used for illicit purposes. Some raiders attacked the California ranchos for horses and captives to sell in the extensive Indian slave trade. Mexicans, ex-trappers and Indian tribes, primarily the
Utes, all participated in the horse raiding. With allies,
Walkara was known to steal hundreds to thousands of horses in a single raid. Native Americans along the route were at risk of being taken captive, especially the women and children of the
Paiute, who were sold as domestic servants to Mexican ranchers and other settlers in both California and New Mexico. Mexican traders and Indian raiding parties both participated in this slave trade. The consequences of this human trafficking had a long-standing effect for those who lived along the trail, even after the trail was no longer in use. Intermittent Indian warfare along the trail often resulted from such slave raids by unscrupulous traders and raiding Indians.
John C. Frémont, "The Great Pathfinder", took the route, guided by
Kit Carson, in 1844 and named it in his report published in 1845. The New Mexico-California trade continued until the mid-1850s, when a shift to the use of freight wagons and the development of wagon trails made the old pack trail route obsolete. By 1846 both New Mexico and California had been annexed as U.S. territories following its victory in the
Mexican–American War of 1846–1848. After 1848 numerous
Mormon immigrants began settling in
Utah,
Nevada, and
California all along the trail, affecting both trade interests and tolerance for the slavery of American Natives.
Place names used in this article refer to present-day states and communities. Few (if any) settlements existed along the trail, except in the coastal plains of Alta California, before 1850, although many of the geologic features along the Trail retain their Spanish designations. ==Description of the trail route==