2010 Map of Hillsboro

About this map

The Hillsboro Historic District sits at the heart of this landscape, marking a concentration of residential and civic history along the banks of Percha Creek. This region of Sierra County is defined by its extensive mineral heritage, evidenced by the dense cluster of claims within the Lake Valley Mining District. Prospectors and historians can trace numerous named sites including the Empire Mine and the Rattlesnake Placers, while more specialized industrial efforts are represented by the Vanadinite Mine and the curiously named National Defense Department Number One. The terrain transitions from the heights of Empire Peak down into the narrow passage of The Box. Arroyos and canyons like Greyback Arroyo and Warm Springs Canyon carve through the mesa land, highlighting the geological complexity that once drove the local boom-and-bust economy.