The Lys (

Walser German Walser German () and Walliser German (, locally ) are a group of Highest Alemannic dialects spoken in parts of Switzerland (Valais, Ticino, Grisons), Italy (Piedmont, Aosta Valley), Liechtenstein (Triesenberg, Planken), and Austria (Vorarlberg ...

: ''Liisu'' or ''Lyesu'') is a small river (classified as a '' torrente'').

Geography

It flows from the Lys Glacier on the south side of the

Monte Rosa Monte Rosa (; ; ; or ; ) is a mountain massif in the eastern part of the Pennine Alps, on the border between Italy (Piedmont and Aosta Valley) and Switzerland (Valais). The highest peak of the massif, amongst several peaks of over , is the D ...

massif, at the foot of Vincent Pyramid, elevation , and runs through the Gressoney Valley, flanked by a road, through the following municipalities: *

Gressoney-La-Trinité Gressoney-La-Trinité (; Gressoney or ''Greschòney Oberteil''; ) is a town or ''comune, commune'' and renowned alpine resort at the foot of Monte Rosa in the Lys (Dora Baltea), Lys Valley, which is part of the Aosta Valley region of Northwest It ...

* Gressoney-Saint-Jean * Gaby *

Issime Issime (; Issime ; ; Valdôtain: (locally in ''patois gabençois'' )Obsolete. Recent works in German indicate the official French name only - cfLiederbuch von Gressoney und Issime and Peter Zürrer, ''Sprachkontakt in Walser Dialekten: Gressone ...

* Fontainemore * Lillianes * Perloz It converges with the

Dora Baltea The Dora Baltea () or Doire Baltée () is a river in the Aosta Valley and in Piedmont, in northwestern Italy. It is a left-hand tributary of the Po and is about long. Name The river's Latin name was ''Duria maior'', ''Duria Baltica'' or ''Duri ...

(fr. ''Doire baltée'') as a right tributary at Pont-Saint-Martin. Its left-side tributaries are Avant-Cir, Glassit, Loo, Mos, Niel, Pacoulla, and Tourrison. From the right it receives: Rû de Nantay, Stolen and Valbona.

Gallery

Lys river springs.jpg, The sources of the Lys at the Lys glacier in the

mountain massif, below the Vincent Pyramid and close to the giant

Lyskamm Lyskamm (, formerly ''Lyskamm'', literally "crest of the Lys"), also known as Silberbast (literally "silver bast"), is a mountain () in the Pennine Alps lying on the border between Switzerland and Italy. It consists of a five-kilometre-long ridge ...

(4.533 m) Lys vicino a Gaby.jpg, The river close to Gaby Duarf an der Lys, Hauptort der Gemeinde Issime im Aostatal, Italien.jpg, The river close to

FontainemoreAugust192023 01.jpg, In Fontainemore Pont-Saint-Martin-Ponte-DSCF8380.JPG, The Pont Saint-Martin PerlozAug032024 05.jpg, The river Lys in the Perloz municipality Rivers of Aosta Valley Rivers of Italy Rivers of the Alps {{Italy-river-stub