The A841 road is the only A-road on the Isle of Arran and forms the island's primary transport route, as it connects all the major settlements on the island on its course around the coast - Brodick, Lochranza, Blackwaterfoot and Whiting Bay. At only one point does it venture inland, and this is to climb the pass at Boguillie between Creag Ghlas Laggan and Caisteal Abhail.