Múlagöng (Icelandic pronunciation: [ˈmuːlaˌkœyŋk] ⓘ) or Ólafsfjarðargöng [ˈouːlafsˌfjarðarˌkœyŋk] is a one lane tunnel in Iceland, located in Northeastern Region along Route 82, connecting Dalvík and Ólafsfjörður.

It was the fourth tunnel constructed in Iceland.

It has a length of 3,400 m (11,155 ft) and was opened on March 1, 1991.

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