The Cirque de Troumouse is a spectacular mountain amphitheatre that can be reached via the minor D922 and a hair-raising 8km toll road near Gèdre, 6.5km northeast of Gavarnie. From the Cirque de Troumouse parking area, there are various signed walks that offer fine views of the cirque, including an easy 30-minute one-way walk to the Lac des Aires.

The toll-road itself is steep and quite exposed, with hairpin turns and no barriers, so take it slow. Snows permitting, it’s usually open between April and October; the toll is €5 per vehicle.