Well, how high can mountains go?  Can they reach higher than a bomber?  I mean, 40-45,000 feet?  Maybe higher?
Just a nice little valley that is tweaked so no bombers are allowed in or no ord if that is possible?  I know you can take out planes from a field, but what of ord?
And as to your map - that'd be a cool place to fight, but seeing as how once you take off you're already 5k, you can move the bases in closer, it won't be a big deal.