Park in Gavarnie at its designated car park.
Cross through the village of Gavarnie. (1) Take the bridge to the left that leads to the camping site and then keep to the right bank of the Gave de Gavarnie. Continue on the trail to the Hôtellerie du Cirque (2).
Along the way, you should have a good view of the Cirque and a viewpoint.
On the return leg, turn left as soon as possible and take a footbridge to cross the Gave. Then follow it on its left bank to Gavarnie.