rmounce, 24 days ago

to answer my own question (lol!), GraphHopper seems to offer a lot of what I want: https://graphhopper.com/maps/?profile=car&layer=Omniscale

I've also seen BRouter recommended: https://brouter.de/brouter-web/

You can create the trail you want to walk - despite having never been there before (in advance), then just download it as a .GPX file and open/use it on your mobile, completely offline in a suitable app e.g. OsmAnd

#OpenStreetMaps #Trails #HikePlanning