The Lys River originates from the Lys Glacier, located on the southern side of the
Monte Rosa massif, at the foot of
Vincent Pyramid (elevation: 4,215 metres / 13,829 ft). It flows through the Gressoney Valley, which is flanked by a road and passes through the following municipalities: •
Gressoney-La-Trinité •
Gressoney-Saint-Jean •
Gaby •
Issime •
Fontainemore •
Lillianes •
Perloz The Lys converges with the
Dora Baltea (French:
Doire baltée) as a right-bank tributary at
Pont-Saint-Martin. Its left-side tributaries include: the Avant-Cir, Glassit, Loo, Mos, Niel, Pacoulla, and Tourrison. From the right, it receives: the Rû de Nantay, Stolen, and Valbona. The river is classified as a torrente, meaning a fast-flowing mountain stream typical of the Alps. == Gallery ==