Some resources for maps:

• Free maps for Garmin brand GPS devices from OpenStreetMap
• Caltopo Backcountry Maps
• Libre map project, Map and GIS Data By US State
• Canada GeoGrattis (free Canadian maps)
• Gmap4, Share Enhanced Google Maps
• Acme Mapper
• Gaia GPS
• Nearly Every USGS Topo Map Ever Made. For Free.