Helicopters have been drafted in as the search for a missing Scots hillwalker continues into its fourth day.
Finn Creaney was dropped off at Loch Naver on the B873 public road in Sutherland around 2.15pm on Friday.
The 32-year-old, from the Tain area, had plans to walk the route around Loch Naver and South to Golspie.