 The climb proper starts at the junction with the D947, near Chateau Queyras from where the ascent is long.Over this distance, the climb gains at an average of 6.9% and a maximum sustained gradient of 10%.The climb from Briançon, to the north-west, via Cervières to the col is in length, climbing at an average gradient of 5.8% and a maximum gradient of 8.9%.