From Névache, take the D 301T towards the Upper Valley and park at the end of the road at the Laval car park (2030 m).
(S/E) Go to the end of the road and turn right at the roundabout. Go to the back of the car park (often full) then head east-northeast and take the small path in the same direction.
This crosses the Ruisseau de Saint-Jacques stream, then climbs and heads east-southeast for about 300 m, then northeast, gradually approaching the Cula torrent, which it joins.
(1) Then follow the right bank of the torrent off-trail, heading north-northeast then east-northeast (azimuth 70°) in the wide valley, keeping well to the left of it.
On the way up, do not cross the stream, even though a first footbridge invites you to do so.
(2) At an altitude of 2,362 m, cross the stream and move to the left bank (i.e. to the right of the stream when ascending).
Then climb north-east then north-north-east to join theGR® Grand Tour du Thabor.
(3) Continue on the right along theGR® and cross the second branch of the Cula stream via the footbridge.
(4) Immediately after, at the intersection, take the path on the left to the south-east which climbs towards Lac de Cula (cairns).
(5) A short walk around the lake is a must. I suggest you climb the small hill to the west of the lake, marked by two superb cairns, to enjoy the magnificent view of the Cerces massif.
To return, head back to the footbridge.
(4) Cross it and continue to the next junction.
(3) Leave the path you took on the way up and continue along theGR® Grand Tour du Thabortrail. After an almost horizontal traverse along the western flank, this trail descends towards Laval, joining a track that you simply follow to the left until you reach the car park (S/E).

