124 km mainly cycle tracks along the river Inn.
The first part until Neuötting I took the shortest route through the Isen valley. There are bridleways and small roads. One critical point was near Marktl with a very steep part without forewarning. I did not dismount in time an had a first meeting with the surface. The only damage was an USB cable for the phone that was torn in two parts. Cause was that I did not release my shoes from the pedal clip before I started the climbing.
After 50 km I passed Braunau with a camping, but it was to early to stop already. Next campings are near Bad Füssing, but they seem not to take cyclists. As I passed the area there was not any sign showing the entrance. On this part of the route I drifted away from the direct Inn cycle path, because a part was closed for maintenance. But also the small agricultural roads are nice. There are small villages with huge churches and some farms have old wooden buildings.
I returned to the Inn cycle path as the small roads ended up in roads with higher car traffic.
In the area between Würding and Neuhaus am Inn the cycle path is on a high dike, but after Neuhaus until the city boundary of Passau the route is through the woods and rocks. Some steep parts are here as well, at least to steep for the combination trekking bike with camping equipment and a rolling surface of round pebbles.
In Passau the cycle path still follows the Inn, but at the left site are expensive apartment houses instead of trees. The cycle path leads directly into the center.
From there it is a short way to the tent camping near the river Ilz, the smallest river of the three that confluence in Passau. The biggest is the Inn and the longest is the Danube.