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Y Couloir

Gressoney La Trinité

Monte Rosa

Another entrance for Lys valley

Ski Touring Severe

1.3 km
198 m
250 m
0-1 hrs
Low Point
3.1 km
High Point
3.4 km
Y Couloir Map

Another couloir to access the Lys Valley, this is a bit lower then Guides Couloir but more skiable. Often a 60m rappel is required to enter the first part then it's pure freeride into this magic itinerary. From Indren keep skiing on your right and continue skiing till you pass under the first big rock bar. Here the slope will be flat so you can easily put on your skins. Go uphill for about half an hour towards Mantova Refuge. When you're about under the refuge stay on your left following the evident rock ridge till a cross. From here starts the couloir. The first section is quite steep (45°), 40m of rope are useful to ski this first part. There are some bolts where you can set up the rappel. The first part is the steepest then the slope gently descends into the Lys glacier. This line follows the amazing Lys glacier till town. The slope is never too steep and always nicely skiable. The last section follows a deep forest into town (Staffal). You'll reach the lifts with skis on your feet!



Steep skiing at 38-45 degrees. This requires very good technique and the risk of falling has serious consequences.

High Exposure (E3)

3 out of 4

In case of a fall, death is highly likely.


4 out of 4

In the high mountains or remote conditions, all individuals must be completely autonomous in every situation.

Best time to visit

between January and April


  • Trees
  • Cliffs
  • Glacier
  • Walk Required

Equipment required

  • Rope
  • Skins
  • Crampons

Similar routes nearby

Guidebooks in this area