USGS has been moving towards serving data through The National Map Viewer. They have several WMServices through their website that serve elevation data to the public (hillshade & DEM). The problem is that geoprocessing tools in ArcToolbox won't accept these layers as inputs.
Where can I download (free) DEM gis data that I can use in analysis? I'm specifically interested in the 1/3 arc second (~10m) or the 1 arc second (~30m) data.
Currently I'm going through the USGS NED Tile download tool, which has ~4 files per county. My areas of interest cover about 50 counties -- I don't see myself manually downloading these files one by one.