Lys (river)

Lys Liisu, Leisu
The Lys in Gressoney-Saint-Jean
Data
location	Italy
River system	Po
Drain over	Dora Baltea  → Po  → Adria
source	Lys Glacier outflow , Monte Rosa 45 ° 53 ′ 0 ″  N , 7 ° 48 ′ 40 ″  E
Source height	2500  m
muzzle	At Pont-Saint-Martin in the Doire Baltée Coordinates: 45 ° 35 '24 "  N , 7 ° 47' 33"  E 45 ° 35 '24 "  N , 7 ° 47' 33"  E
length	40 km

The Lys (Greschòneytitsch: Liisu; Éischemtöitschu: Leisu ) is a 40 km long tributary of the Dora Baltea in the Italian region of Aosta Valley . It rises from the Lys Glacier at the foot of the Vincent Pyramid (4215 m) and flows through the Lystal . At Pont-Saint-Martin the Lys flows into the Dora Baltea.