@WedaPashi About 1030 km. I'll upload a track to wikiloc later, but my route started near Frankfurt am Main (Germany) and roughly followed the rivers Main, Tauber, Wörnitz, and Lech to the Alps, then with the Via Claudia Augusta over the Fernpass (Austria) to the Inn valley and over the Reschenpass (border Austria/Italy) to the Etsch/Adige valley, with an excursion through Valsugana to Bassano del Grappa (Italy) at the envery end.