From the small bridge (1120m), follow the snow covered road which leads to the Chevenne chalet (1217m).

From there, there are two possibilities for reaching the base of the corridor: -climb directly to the NW towards Pas de la Bosse (1816m) passing the Cheneau chalet via GR5; -or continue in the direction of Ubine pass to reach the Mens chalets (1588m), Combe du Trot and finally Pas de la Bosse by means of a small traverse under the N slope of Pointe de la Bosse (slightly longer but prettier);

From Pas de la Bosse, traverse towards the SE to reach the base of Séraukin corridor. Go up it more or less following  the summer route which takes a secondary corridor bordering the Séraukin on its right bank (W side). At the top of this corridor, you reach the principal slope by a small exposed, but not very difficult, traverse. The access to the notch of the Séraukin is defended by a last steep slope (45°).

From the notch, traverse on the S side under the western Cornette then go N to easily reach the edge of the summit crest. Pass around a window (rocky pocket) looking on the N slope, to pass a last steep pitch on the right, then reach the summit cross via broader slopes.

Descent by the same route until the notch of the Séraukin. Then remain in the broad slopes of the principal corridor, bordered by the walls of the SW ridge. Lastly, take one of the routes described above to reach the Chevenne chalet.

The Mens route adds a hundred metres of HD and a little distance. It is however wilder and generally has better snow cover.

The corridor is rather broad and with a moderately steep slope: 35 with 38° over 400m. Average exposure but some bars appear in the base following snow cover. The top out is more steep and exposed: 45° over a few tens of metres. D/S5 or 4.2/E2 to E3.

The corridor is S but is protected by the proximity of the SW ridge walls, so there is not much morning sun. The steep slopes under the notch face W.

Access:
Head to Chapelle d'Abondance on D22 from Thonon and Abondance or Morgins and Chatel. In the town, take the road which climbs N towards the Chevenne chalets. In season the road is often barred at the level of the small bridge above the crossroads at approximately 1120m.

Ice axe/crampons. Possibly a small rope for the traverse of the ascent corridor and a few parts of the summit ridges.