Clear recommendation to get some good food on the way to Linz/Vienna or of course in the other direction to Passau. Simply go down the Danube on the left bank of the Danube from Passau/Obernzell/Jochenstein/Niederanna until the official cycle path ends (it's on the tarmac 😂 be careful) and then just go up to the left 👍🏻 Coming up from Linz you have to take the Au ferry to the other side of the Danube before the Schlögnerschlinge. It's definitely worth it 👍🏻 Enjoy your meal