From Tarbet the A83 runs west across the watershed between Loch Lomond and Loch Long to Arrochar near the head of Loch Long. It then goes round the head of the loch, and along the western shore for a short distance, before turning NW up Glen Croe to the Rest & be thankful viewpoint picnic area in Cowal, at the pass through the Arrochar Alps from the shore of Loch Long to that of Loch Fyne. It was near this spot that an RAF Tornado crashed on 2 July 2009.