Boroghil Pass: the Afghan border
I don't think I quite made it to the Afghan border, though I did wander half a kilometre or so ahead of the rest of the group -- I could always see them, but they lost track of me and got a bit worried at one point.
For more information about the Wakhi people we encountered, see my reviews of The Voice of the Nightingale: A Personal Account of Wakhi Culture in Hunza and The Kirghiz and Wakhi of Afghanistan: Adaptation to Closed Frontiers and War.