OpenStreetMap - OSM
A vélo
https://www.opencyclemap.org/
https://www.cyclosm.org
https://brouter.de/brouter-web
https://cycling.waymarkedtrails.org
https://brouter.de/brouter-web/
https://www.cyclosm.org
https://www.opencyclemap.org/
https://sig.af3v.org/index.php/view/map/?repository=rep1&project=veloroutes