1959 Map of Bonanza

About this map

Rawley Mines and dozens of other mining claims dominate the rugged topography south of Marshall Pass in this mid-century survey. The settlement of Bonanza remains a central hub for the district, supported by industrial operations like the Superior Mill and Little Bonanza Mill. The landscape is a network of legacy extraction sites including the Cocomongo Mine, Stamwinder Mine, and Michigan Shaft. Transportation is defined by the Denver and Rio Grande Western Railroad, which winds through the mountains to reach Mears Junction. Nearby, the former locations of Kerber City and Shirley are noted as sites, indicating a shift in the local population centers. This map captures the intersection of three distinct administrative regions: the San Isabel, Gunnison, and Rio Grande National Forests, converging near the high peaks of Mount Ouray and Antero Peak.