1967 Map of Union Pass

About this map

Black Mountains geology and mining history dominate this 1960s survey of the Mohave County desert. The landscape is defined by its arid complexity, with drainage systems like Katherine Wash and the deep cuts of Secret Pass Canyon illustrating the rugged hydrologic patterns of the region. Prospecting and resource extraction are clearly evidenced by the Tyro Mine in the northern reaches and the Arabian Mine further south, both situated amidst the dramatic elevations of Sugarloaf Mtn and Thumb Butte. This map also captures the critical transit route through Union Pass, a historically significant crossing for travelers navigating these peaks. Small but vital water sources such as Secret Pass Spring are marked throughout the terrain, providing a look at the essential points of interest for early settlers and miners in this remote part of Arizona near the Nevada border.