Bláfjallavegur (Icelandic pronunciation: [ˈplauːˌfjatlaˌvɛːɣʏr̥], "Bláfjöll Road"), designated as Route 417, is a national road located in the Capital Region of Iceland.

It runs from Route 1 near Sandskeið, through the nature preserve of Bláfjallafólkvangur [ˈplauːˌfjatlaˌfoul̥kˌvauŋkʏr̥] up to Route 42 at Hafnarfjörður.

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