1987 Map of Joshua Flats

About this map

Joshua Flats and the nearby Cowhorn Valley reveal a landscape shaped by mineral exploration and rugged relief along the border of Inyo County. This 1987 provisional survey documents several extraction sites, most notably the Nikolaus Eureka Mine located in the northern hills. The terrain is marked by numerous prospects and isolated quarries, indicating a period where small-scale mining and resource sampling were common across the high desert ridges. Beyond the industrial sites, prominent geographic landmarks such as Lime Hill and a specific Borrow Pit provide spatial context to a region otherwise defined by its sparse settlement and high-altitude valleys. The map serves as a detailed record of the physical land features before more modern transformations, preserving the locations of specific mining claims and the primitive road network that connected these remote operations.