Over mountains - how high?
I am planning a route through the Alps this Sept, from Switzerland to Venice.
I haven't yet worked out the route; it is non-trivial because there is so much controlled airspace. But at this stage I would like an idea (without attending a mountain flying course) how high one needs to be above say the nearest peak within 10nm either side of track, to ensure that the various types of wind don't get you.
The aircraft has a ceiling of 20,000 feet at the configuration in question and I have oxygen. So no need to fly in between anything - I intend to go well above.
I gather 2000ft might be enough provided the forecast winds aloft are below 30kt.
I would also aim to do the transit as early in the morning as possible.
Any advice would be much appreciated.