Roughly bounded Iowa Hill, canyon of North fork Of American R., until at Secret Ravine, top of ridge of Colfax, Colfax, California. County/parish: Placer.
Added to the National Register of Historic Places November 20, 2002. NRIS 02001391.
1 contributing structure.Also known as:
National Park Service documentation: https://catalog.archives.gov/id/123860412