120 km
I used an abbreviation to return to the cycle path bypassing one bend in the river Doubs. It was not yet very hot in the morning an the small climb was not a problem. Later this day I would have avoided it. Besides the canal, the river and the locks in an awesome environment, there were two tunnels for the canal. The cycle path E6 is on the bridlepath tunnel in Besançon.
This time the camping was directly on the route. There are a lot of cyclists here.
Paul

78 km (late start after 14:00h)
Now I start a 2nd attempt to make a bicycle tour to Santiago de Compostela. My wife Monika dropped me near the Rhine – Rhône canal where I saddled my mountain bike and trailer. I use this one wheel trailer to reduce the weight on the bike itself.
I follow at the start the European cycle path no 6. This part is in the bridleway oh the canal. In Mulhouse a deviation was signed out, but it was not shown that it is for path no 6. I found out some 400 m later: A bridge was closed by fences. Though it was possible to pass the first fence and use the bridge, it wasn’t possible to pass the fence at the other end in a reasonable time. I returned and used the deviation. The cycle path was pretty flat, just a short ascending at every lock.
Normally I would be faster, but a strong and hot wind slowed me down. It was Sunday and a lot of other cyclists were on the path. Long distance cyclists were also among them.
At the end of the day I started looking for a campsite. The nearest was about 7 km off the no 6 at the border of the river Doubs.
Paul