What about Courchevel (LFLJ),
elevation 6588ft, 18.5% uphill slope, and less than 1800ft length. Most astonishing, that this airport has served Dash 7's in history.
A friend of mine's landed there in a glider as bad weather prevented him from making it back to home field and it was getting too late to get from there to anywhere halfway landable. Still better than the basically unlandable fields in that area but still something I wouldn't recommend trying, especially in an engineless plane which means you only have one chance to get it right.
