One resource I use a lot to track down old railbeds is the USGS Historical Topographic Map Explorer at:
https://livingatlas.arcgis.com/topoexplorer/index.html
You type in the place you want to view or zoom to it. You then pick a location on the map with your mouse. The Explorer then shows all topo maps that exist for that location. Once you select one, it overlays over the current map. You can adjust the transparency of the overlays to clearly see what was on top of what is. you can display multiple topos and adjust each individually.
The perfect tool for finding old alignments and relics!
https://livingatlas.arcgis.com/topoexplorer/index.html
You type in the place you want to view or zoom to it. You then pick a location on the map with your mouse. The Explorer then shows all topo maps that exist for that location. Once you select one, it overlays over the current map. You can adjust the transparency of the overlays to clearly see what was on top of what is. you can display multiple topos and adjust each individually.
The perfect tool for finding old alignments and relics!