Only where you were on foot, you were really - Goethe
Lonely in Italy: the Val Grande.
The premium hiking path swell in one go, in one day. About 5-8 kilometers short, so only about 50 kilometers.
200 kilometers, 10,000 meters altitude on the Westweg.
A long walk on the shores of Lake Constance and the Rhine.
Through the loneliest desert mountains in Morocco.
Almost 150 kilometers and 10,000 meters in altitude - the E5 from Germany via Austria to Italy.