Access the car park from the Champsaur valley, after Pont du Fossé, on the left, and continue to the end of the road.
(S/E) Continue along the path under the trees until you reach the bridge over the source of the Drac Blanc.
(1) Cross it and continue along the wide track leading to the refuge on the left bank of the torrent.
Climb the path through a moorland (blueberry bushes). Walk along the mountainside, above the river in a rocky landscape. You will reach the Prelles waterfall.
(2) Continue along the track to easily reach the Pré de la Chaumette refuge after crossing the Drac again.
(3) Take the path on the right bank of the torrent, which is theGRP®® du Tour du Vieux Chaillol marked in red and yellow. Walk along the ruins of the hamlet of Chaumeillon.
(4) Continue along the path to easily reach the initial crossroads.
(1) Retrace your steps to return to the car park where you started (S/E).