@PaulHammond51
The #MMGIS leaflet map URL, mars.nasa.gov, now redirects to trek.nasa.gov and throws a dialog to your face if you don't accept cookies. I haven't found where the previous map with all the waypoints and paths has gone, if it is still online. I used that map occasionally, it was very friendly and comprehensive.
Fortunately the JSON files are still being served from the mars.nasa.gov/mmgis-maps/M20 URL, so my QGIS maps can be updated.