Leadville, Colorado Overview. Leadville, Colorado includes 13,332 nearby mines. Leadville is a statutory city that is the county seat of and the only municipality in Lake County Colorado United States.
Oct 22, 2016· A number of towns boomed out of the earlier gold claims but they never became permanent settlements because the surface placer gold in those places was quickly mined out. In those early days, most of the miners found out that gold mining in claims within the Leadville mining district using sluice boxes was hampered by the heavy black sand.