@Gary-France @Martin-Garand At the moment I don't have the time to make screenshots en describe how to do this same kind of thing, but in short I utilize the colored waypoint as used by the RohteXperts to designate the stops and use the time and distance at every routepoint in the routepoint menu to determine where to lunch etc. Afterwards I split the route in to separate parts for TT riders or even MRA Nav users.

I can spare some time tonight GMT+0 time to further describe this if you're interested?

@Bas-Kappert Hi Bas, as @Drabslab mentioned, the favorites you make in Navigation are also present in the favorites in the MRA Web environment and vice versa.

If you want to delete the favorites only from Nav: that's not possible. Favorites can be deleted through the favorites menu. Clicking the favorite in question, in this case I clicked MCE, and then clicking the big X in the routepoint menu as shown:

@brane-0 hi Brane,

It seems that part of the 258 is closed at this moment(seasonal close of the road).

Below I mapped the same route in the HERE map (gold membership function) with the season closes still active in the algorithm:

Then I switched off the seasonal road closings which is only possible in the HERE Map and you need to be gold member to use HERE, and the route will follow the 258 exactly like you want:

See this functionality here(Dutch app though):

If you know for sure that this road is open when you are planning to ride it, you can ignore this "error", since the road will be open as you arrive there. You may also put the route point 5 on "off-road" mode so that the route part between 4 and 5 is sort of ignored and you just drive to point 5 on the 258 without any navi instructions.
Multiple solutions are possible, it simply comes down to which way you like it.