Date of your route : Sep 02, 2017
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
A very pleasant walk, and if I hadn't been caught in the storm and hail, I would probably have found it too short. 
Starting from the water tower (max. 3 cars in the car park, so it can quickly become difficult to park if it's busy), although Sudel is signposted on your left, go straight on following the "promenade équestre" sign. The path on the left is where you'll return.
The climb is really good: it's never so hard that you have to stop to recover, just steep enough for a good cardio workout. There are no fallen trees to worry about, and you can often see the valley through gaps in the trees. The forest is beautiful, pure bliss.
There are indeed no views at Sudel. If you're not superstitious*, I suggest you turn around and follow the sign for "Montori" so you don't have to retrace your steps.
This will take you to the ruins of Montori Castle, where you will have a view of the valley below. It only adds about a kilometre to the walk, with the slight downside that the paths down from Montori are a little less charming than those we climbed up.
Note that there is only one sign pointing to Montori, so just keep going straight along this little-used path, which is covered with vegetation in places.
I can provide my GPS track for anyone who wants it.
- There is a legend in Masevaux that says the lords of the castle used to come down from the mountain in a carriage drawn by headless white horses, and woe betide anyone who crossed their path... I didn't see anyone.

Machine-translated