One has to think about it, yes. It's not too bad in good VMC if one follows the valleys and keeps some height margin. If one would really be able to pull off a forced landing in spite of all the cables, obstacles, uneven topography etc.. is another story and greatly depends on the exact location it would be required. You can see the flight in 3D here
There are published "GAFOR" routes with weather forecast and so called "reference altitudes" (highest elevation +/- 600meters laterally) along the valleys and passes.