Between 1776 and 1821, when sovereignty over Spain's dominions in North America fell to Mexico, there was some Spanish trading in the regions discovered by Dominguez and Escalante, but it was probably not until later, as the caravan trade developed between New Mexico and California, that the Glen Canyon region was again visited. The so-called Spanish Trail between Santa Fe and San Gabriel, which crossed the Colorado at Moab and the Green at Green River and headed the river canyons of southern Utah, was opened during the Mexican period and Mexican as well as American traders traveled it. Before 1848, when American rule began, there is at least one recorded crossing of Glen Canyon, this at the Crossing of the Fathers by the Antonio Armijo par...