The Eisack (german: Eisack, ; it, Isarco ;
Latin
Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power ...
: ''Isarus'' or ''Isarcus'') is a
river
A river is a natural flowing watercourse, usually freshwater
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the ...
in Northern
Italy
Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical ...
, the second largest river in
South Tyrol
it, Provincia Autonoma di Bolzano – Alto Adige lld, Provinzia Autonoma de Balsan/Bulsan – Südtirol
, settlement_type = Autonomous province
, image_skyline =
, image_alt ...
. Its source is near the
Brenner Pass
The Brenner Pass (german: link=no, Brennerpass , shortly ; it, Passo del Brennero ) is a mountain pass through the Alps which forms the border between Italy and Austria. It is one of the principal passes of the Eastern Alpine range and ha ...
, at an altitude of about 1990 m above
sea level
Mean sea level (MSL, often shortened to sea level) is an average surface level of one or more among Earth's coastal bodies of water from which heights such as elevation may be measured. The global MSL is a type of vertical datuma standardise ...
. The river draws water from an area of about 4,200 km². After about 96 km, it joins the
Adige river south of
Bolzano
Bolzano ( or ; german: Bozen, (formerly ); bar, Bozn; lld, Balsan or ) is the capital city of the province of South Tyrol in northern Italy. With a population of 108,245, Bolzano is also by far the largest city in South Tyrol and the third ...
. At first the river flows through 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
Sterzing (; it, Vipiteno ) is a comune in South Tyrol in northern Italy. It is the main town of the southern Wipptal, and the Eisack River flows through the medieval town.
History
Origin
The town traces its roots to 14 B.C., when Nero Claud ...
,
Franzensfeste,
Brixen
Brixen (, ; it, Bressanone ; lld, Porsenù or ) is a town in South Tyrol, northern Italy, located about north of Bolzano.
Geography
First mentioned in 901, Brixen is the third largest city and oldest town in the province, and the artistic and ...
,
Klausen,
Waidbruck and finally the capital city of the province. In
Brixen
Brixen (, ; it, Bressanone ; lld, Porsenù or ) is a town in South Tyrol, northern Italy, located about north of Bolzano.
Geography
First mentioned in 901, Brixen is the third largest city and oldest town in the province, and the artistic and ...
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 Derjon ( lld, Derjon; it, Rio Gardena; german: Grödner Bach) is a stream in South Tyrol, Italy
Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the mid ...
, the
Braibach (also known as Tierser Bach), the
Eggentaler Bach and the
Talfer flowing from
Sarntal.
The Eisack is used extensively for the production of electricity; it is dammed near
Franzensfeste,
Klausen and
Waidbruck.
External links
Eisack Water quality report
Rivers of South Tyrol
Rivers of Italy
{{Italy-river-stub