Killiecrankie is located a few miles north of Pitlochry just off the main A9 road.
Hillwalking Killiecrankie - Scottish Walks.
From the rear of the Loch Faskally campsite, north Pitlochry, pick up a path, northwards by the River Garry. The walk follows the riverside, past Garry Bridge, for a liesurely trek of about 1hr till you reach the Pass and then the Soldiers Leap, where the Visitor's Centre is located. The Centre has all the usual paraphernalia, maps etc and also some lovely paintings of the area.
Crossing the road from the Visitor's Centre, the path continues for a few miles and approaches the base of Ben Vrackie, though this part may add around 4hrs to your walk.