I'll have to convert the others to a Maps Engine Map, but you should be able to download 'Maps Engine' app for your phone, log in to your Google account and load a saved map, then hit Directions to start navigation.
To create maps for the Maps Engine go to https://www.google.com/maps/myplaces, create a map, then save it.
Let me know if you can save the Mt Nebo route to your own maps, if not I'll have to set the permissions to allow everyone to edit them.