Dunnet Head (Scottish Gaelic: Ceann Dùnaid) is a peninsula that includes the most northerly point of the mainland of Great Britain. The point lies in Caithness, on the north coast of Scotland. The point, known also as Easter Head, is at 58°40′21″N, 03°22′31″W (grid reference ND202767), about 18 km (11 miles) west/northwest of John o' Groats and about 20 km (12 miles) from Duncansby Head. Dunnet Head can be seen also as the western limit of the Pentland Firth on the firth's southern, or Caithness, side (Duncansby Head is the eastern limit).
The headland's boundary with the rest of the Scottish mainland can be defined as a north-south line running from Little Clett (ND220740) to the mouth of Dunnet Burn (ND217709) in Dunnet Bay. This line is followed along most of its route by a single track road, the B855, which links Brough with the village of Dunnet, making this the most northerly road on mainland Britain. From this line, the headland projects westward and northward into the Atlantic Ocean and the Pentland Firth and shelters the more southerly waters of Dunnet Bay.
The peninsula is east of the burgh of Thurso, and on a clear day, it affords excellent views of the islands Stroma to the east, and Hoy and the Orkney Mainland, 15 km (nine miles) away to the north, across the Pentland Firth.