The Old Spanish Trail was designated a national historic trail by an act of Congress in 2002. From 1829 to 1848, this major trade route extended 2,700 miles between Santa Fé de Nuevo Mexico (Santa Fe, New Mexico), and Alta California (Los Angeles, California). The trail was opened to California when Mexico won independence from Spain in 1821. California was an important market, and annual trade caravans carried woven woolen goods from Nuevo Mexico and returned with mules and horses. Captured Native Americans were readily sold as slaves in California and Nuevo Mexico. The Ute Indians also participated in the horse and slave trades, though they used the trail less frequently.
The Old Spanish Trail in Colorado was part of three trail systems on very different routes. The Armijo Route was used only once by a party led by Antonio Armijo in 1829; it clipped the far southwestern corner of the state. Beginning in 1831, the main Spanish Trail traversed a larger portion of southwestern Colorado before entering Utah and crossing the Colorado River at Moab, Utah, en route to California. The portion in Colorado was initially traveled by Juan de Rivera in 1765 and by the Dominguez-Escalante expedition in 1776.
The North Branch is the longest of the routes in Colorado. It extended north through Taos, New Mexico, through the San Luis Valley, then west across Cochetopa Pass, over Cerro Summit, and into the Uncompahgre Valley. It crossed the Uncompahgre River near present-day Montrose and then headed north to cross the Gunnison River northwest of Delta. Continuing north along the general course of present US Highway 50, it crossed the Colorado River at Grand Junction, and continued into Utah near the spot where Interstate 70 enters the state.
The North Branch intersected the main Spanish Trail in Utah’s Cisco Desert before crossing the Green River. Another part of the trail took a more northerly course after crossing Cochetopa Pass, passing through present-day Gunnison, then taking a route through present-day Crawford and down the North Fork of the Gunnison River, where it joined the more frequently used route northwest of Delta. The North Branch was the trail trappers used to access parts of western Colorado and eastern Utah. The trappers’ primary destinations were Antoine Roubidoux’s trading posts at Fort Uncompahgre (near present-day Delta), Fort Uintah (in Utah’s Uintah Basin), and the Salt Lake Valley. New Mexicans also used the North Branch as a principal route for trade with the Utes.
End of International Trade and Modern Development
After the United States acquired New Mexico because of the Mexican-American War (1846–48), the Spanish Trail ceased to be a major trade route between New Mexico and California. Some used the main trail to reach California during the 1849 Gold Rush, and thousands of sheep were driven to California from New Mexico in the early 1850s to feed hungry miners. Also in the 1850s, the trail was used by government explorers. Expeditions to identify a route for a transcontinental railroad began in 1853. Traveling along the North Branch that year was Col. Edward Beale, followed a few months later by John W. Gunnison and then John C. Frémont. In 1858 portions of the North Branch were improved by Col. William Loring as part of a military wagon road connecting Utah’s Salt Lake Valley to Fort Union, New Mexico. The main trail was used by the Macomb expedition in 1859 in its journey to find the junction of the Colorado and Green Rivers.
More of the trail was improved as wagon roads for local travel, and later as county roads and automobile highways. Where it has not been improved it is difficult, if not impossible, to see the original trail route. In 2010 the Bureau of Land Management funded a project to identify portions of the trail on its land. This resulted in more accurate knowledge of the route, and seventy-six miles of the trail in Colorado were mapped and described.