Departure from the Ubine chalets (car park on the right-hand side of the road just before you reach the chalets). Access from Vacheresse (at the bottom of the Vallée d'Abondance, between Chevenoz and Bonnevaux) via the small road signposted "Bise/Ubine" then "Ubine".
From place to place, there are directional signs and signposts with yellow arrows.
(S/E) Go to the end of the car park and climb up towards the chapel through a gate. Go around the chapel on the right and, at the information sign, turn right towards the Col d'Ubine. Leave the Friends of Nature refuge on your right and climb up an alpine path, passing a cross on your left. Continue along the path and cross a few streams.
(1) Leave the path when it climbs towards Pointe de Lachau and take a fairly flat path on the right towards the Col d'Ubine, which is clearly visible. N.B. The IGN map is inaccurate here: the path further north does not exist and the climb up the mountain path is not shown. Cross a stream near a cluster of spruce trees. At the pass, the slope becomes steeper: follow a few switchbacks to reach the pass.
(2) Then head left (north) towards Pointe de Lachau. Follow the ridge, which is steep and partially wooded at the start. Be careful of the escarpments on the right (east side). The slope becomes gentler and more open as you approach the summit.
(3) Leave the summit by following the ridge due west. Overlook a small grassy cirque on your left, then cross a partially wooded area in a west-southwest direction. Then turn southwest and descend a very steep slope (the IGN map is approximate here; the route has been based on the satellite view).
(4) You will come to the path leading from Lac des Fontaines. Follow it to the left (southeast) to return to the Chalets d'Ubine, which are clearly visible (S/E).
