The summit sites present many a good track for GPS devices.
What if there is none?
A very useful and comfortable tool
to mark out a track on a map
to generate the GPX (KML) file of the track
to show an elevating profile (altitude, distance, overall duration) of the track (printable)
to print a map with the track on it
can be found there: https://www.outdooractive.com/de/routeplanner/
73, Alfred, OE5AKM