An abandoned mine in South Dakota near the Black Hills.
Abandoned Mine Entrance, Black Hills National Forest
Carved into a rugged slope of weathered schist and limestone, this small mine entrance sits near the historic mining corridors west of Custer, South Dakota — a remnant of the Black Hills’ 19th-century gold rush. The opening, likely hand-dug or expanded with early blasting techniques, leads into mineral-rich rock layers once prospected for gold, silver, and iron sulfides that fueled the regional boom of the 1870s. Surrounding the portal are piles of tailings and fractured quartz veins that reveal the area’s geologic complexity — part of an ancient mountain uplift more than 1.8 billion years old. Today, the forest has begun to reclaim the site, with pines and brush growing over the spoil heaps, blending traces of human industry back into the Black Hills landscape.
