here. That site's great. The pack of hiking trails GPX has a single file for each trail. It makes it easy to pick what you want loaded rather than loading all 150 trails onto your device.
That particular map is just the USGS Topo. I think it's from CalTopo. But I have access to USFS Topo from CalTopo and the USGS Topo from ESRI. Frankly, I don't really know anything about the various sources of USGS topo maps.