Dominguez–Escalante expedition

The Domínguez–Escalante expedition was a Spanish journey of exploration conducted in 1776 by two Franciscan priests, Atanasio Domínguez and Silvestre Vélez de Escalante, to find an overland route from Santa Fe, New Mexico to their Roman Catholic mission in Monterey, on the coast of northern California. Domínguez, Vélez de Escalante, and Bernardo de Miera y Pacheco, acting as the expedition's cartographer, traveled with eight men from Santa Fe through many unexplored portions of the American West, including present-day western Colorado, Utah, and northern Arizona. Along part of the journey, they were aided by three indigenous guides of the Timpanogos tribe (Shoshone or Ute people).

The land was harsh and unforgiving, and hardships encountered during travel forced the group to return to Santa Fe before reaching Las Californias. Maps and documentation produced by the expedition aided future travelers. The Domínguez–Escalante route eventually became an early template for the Old Spanish Trail, a trade route from Santa Fe to Pacific Coast settlements.

Fray Francisco Atanasio Domínguez was born about 1740, and in 1757, at the age of 17, joined the Franciscan order. In October 1772, Domínguez was at the Convent of Veracruz as Commissary of the Third Order. He arrived in Santa Fe on March 22, 1776, in present-day New Mexico, of the Mexican province to inspect the Custody of the Conversion of St. Paul and investigate opening an overland route from Santa Fe to Monterey, California. Upon his return to Santa Fe and Mexico City, Domínguez submitted to his Franciscan superiors a report that was highly critical of the administration of the New Mexico missions. His views caused him to fall out of favor with the Franciscans in power, leading him to an assignment to an obscure post at a Sonoran Desert mission in the Sonora y Sinaloa Province in northern Mexico.

...
Wikipedia