2 - 3
FATMAP difficulty grade
From Groppera ski down the slopes till their end.
Continue going SE towards Angeloga pass, trying not to lose too much height you will arrive in Vallone Stella, where starts the glacier.
Continue skinning up the glacier pointing the NE ridge of Pizzo Stella.
Continue following the ridge till the top. You can go back following the same line you skinned up from.
it will bring you back to the Val di Lei lifts.
Keep in mind that the lifts close at 3:30! Safety glacier material (crampons, harness, rope) is required even though the glacier doesn't present big crevasses on the normal route.