Eisack

Eisack
The river near the city of Bolzano
Country	Italy
Basin features
Main source	Brenner Pass 1,990 m (6,530 ft)
River mouth	Adige
Basin size	4,960.37 km2 (1,915.21 sq mi)
Physical characteristics
Length	99.9 km (62.1 mi)
Discharge	Average rate: 58 m3/s (2,000 cu ft/s)

The Eisack (German: Eisack; Italian: Isarco [iˈzarko]; Latin: Isarus or Isarcus) is a river in Northern Italy, the second largest river in South Tyrol. Its source is near the Brenner Pass, at an altitude of about 1990 m above sea level. The river draws water from an area of about 4,200 km². After about 96 km, it joins the Adige river south of Bolzano. At first the river flows though the Wipptal and after the village of Vahrn through the Eisacktal. Its source is sung of in the Bozner Bergsteigerlied as the northern frontier of the South Tyrolean homeland.

The major towns and villages along the course of the river are Sterzing, Franzensfeste, Brixen, Klausen, Waidbruck and finally the capital city of the province. In Brixen it merges with the Rienz. Several smaller creeks are tributaries, including the Ridnauner Bach, the Pflerscher Bach, the Pfitscher Bach, the Villnößer Bach, the Derjon, the Braibach (also known as Tierser Bach), the Eggentaler Bach and the Talfer flowing from Sarntal.