US Topo Quads


Current GeoPDF (which is actually a combination of vector and raster data, but not very GIS friendly)


USDA Forest Service Quads, GeoPDF and Geotiff


Historical USGS quads from about 1890 to present

DRG--Digital Raster Graphic, a scanned map.

Vector alternatives

Other Historic map scans


Last revision 11/8/2020