Ousdale Broch

Sometime during the 3rd to 2nd century BC, builders raised Ousdale Broch on a narrow terrace between two ravines, giving it a solid stone base and an external diameter of around 16 metres. It belongs to what archaeologists call a 'second-phase' broch, a later style of the tower-building tradition, and its walls still stand over 3 metres high in places, with an internal court roughly 7 metres across at the centre.

The main entrance, built into the southwest side of the wall, was fitted with two sets of door-checks and a guard cell just inside, while a doorway off the central court led to an intramural stairway, a stone staircase built within the thickness of the wall itself, of the same kind that still survives at Mousa in Shetland and at Dun Telve near Glenelg. A ditch may once have surrounded the structure, and traces suggest further outbuildings once stood nearby.

In the centuries that followed, Norse settlers left their mark on the surrounding landscape so thoroughly that the name Ousdale itself, along with those of neighbouring Helmsdale and Berriedale, derives from Old Norse rather than Gaelic or Scots, evidence of a substantial Norse presence along this part of the Caithness coast.

In 1201 Ousdale, recorded as Eyesteindal in the Orkneyinga Saga, became the site of a tense confrontation between William the Lion, king of Scotland, and Harald Maddadsson, the Norse jarl who ruled both Caithness and Orkney. William had sent an army north after hearing of Harald's cruelty towards the people of Thurso, and when the two forces met at Ousdale, Harald found himself heavily outnumbered and sued for peace, so that the standoff ended without a battle being fought.

At some point after the medieval period, a small clearance settlement grew up roughly 100 metres northwest of the broch, later known as Borg, its name recalling the ruined fort beside it. The remains of its traditional longhouses and enclosures are still visible on the ground today, a reminder that this stretch of coast was farmed and lived in long after the broch itself had fallen out of use.

In 1891 the antiquarian James Mackay excavated the interior of the broch, though he left much of the outer wall still buried. His workers found layers of ash and charcoal on the floor together with broken animal bones, large quantities of periwinkle and limpet shells, and wild hazelnuts, alongside artefacts including pottery, polished lignite, quern-stones, whetstones, a metalworking crucible, mica schist discs, part of a jet armlet, and a fragment of a wooden dish. A human skeleton, buried face-down by the entrance to the stairs, was also uncovered and dated at the time to the post-medieval period, though the remains have since been lost and cannot now be reassessed; Mackay's intrusive dig left the structure unstable enough that he built an internal buttress to shore it up.

Between 2015 and 2020 the Caithness Broch Project, a charity set up to promote the region through its archaeological heritage, oversaw a full conservation programme after Mackay's old buttress collapsed, a large tree took root inside the broch, and sections of stonework began bulging inward. Working with Historic Environment Scotland and archaeologists from Clyde Archaeology, the team cleared vegetation, stabilised the walls and cells using hardwood pinnings, reconstructed a stone recess known as an aumbry, and laid geotextile and gravel inside for safe access, before building a new car park, access path, and interpretation panels that turned the site into a short heritage trail.