It originates from glaciers in the mountains of the Tröllaskagi peninsula and also draws from some freshwater springs on its way down Glerá Valley.
The river formed the sandbank of Oddeyri [ˈɔtːˌeiːrɪ] where it enters the sea.
It was important in the dawn of the industrial age in Akureyri when it was dammed and used to produce electricity from 17 September 1922.
[1] This 290 kW (rated capacity) power station was opened on August 27, 2005.
Today the part of Akureyri that is north of the Glerá is called Glerárhverfi [ˈklɛːrˌaurˌkʰvɛrvɪ] (Glerá Borough) or Þorpið [ˈθɔr̥pɪθ] (The Village) and more than 7000 of the town's 17000 residents live there.