Most of this area is cut off from the rest of Pakistan by high snow-filled passes for up to six months of the year (even as speak, I would imagine).
Those airports are:
............Longest
...........runway (ft)...Elev (ft)
Gilgit......5400........4900
Chitral.....5741........3600
Chilas......4500........4150
Skardu.....11944........8200
Of the four, Skardu is the easternmost and the most remote.
Of the four, Skardu is the easternmost and the most remote.
Even at that high elevation, the 12,000 feet would allow a loaded 777 to take off again. The other ones, not so much.