Castle Coroghton Mor, Compass Hill and Cnoc Bhrostan Loop

This short loop on the Isle of Canna packs a surprising amount into roughly 4 km / 2.5 miles, with about 100 m / 328 ft of ascent. Although the distance is modest, the terrain and exposure make the estimated medium difficulty feel fair: expect uneven grassy paths, rough coastal ground, short steeper pulls onto low hills, and sections where wind can be a bigger factor than the gradient itself. The route explores the eastern side of Canna around Coroghon, taking in the dramatic sea stack of Coroghon Castle, the rounded rise of Compass Hill, and Cnoc Bhrostan at about 140 m / 459 ft above sea level. (canmore.org.uk)

The start is best described as near Canna Harbour / Canna Pier, Isle of Canna, Highland, Scotland, which is the island’s main arrival point and the nearest clear landmark for access. Coroghon lies a short distance east of the pier, and the loop heads into the open ground above the harbour and cliffs. If you are planning the walk, it is worth checking the route line in HiiKER beforehand because waymarking on small Hebridean island routes can be limited and the ground can be more obvious on a map than on the hillside. (canmore.org.uk)

Getting there requires a bit more planning than a mainland walk. By public transport, the usual approach is to travel to Mallaig by train or bus, then continue by Caledonian MacBrayne ferry to Canna. Canna Port is the island’s ferry arrival point, and visitor information for the island notes seasonal day-trip options from April to October on certain days, though schedules should always be checked in advance. By car, you would normally drive to Mallaig, park there, and continue as a foot passenger unless you have arranged vehicle transport, since island ferry capacity is limited. (calmac.co.uk)

What the route feels like

From the harbour area, the loop begins gently, crossing pastoral ground with wide views back over Canna Harbour. Early on, the walking is usually straightforward, but the surface can be lumpy underfoot, especially after rain. The first notable landmark is Coroghon Castle, perched on a narrow volcanic sea stack at the island’s eastern end. This is one of the most distinctive features on Canna: a tiny tower set above steep rock and sea, giving the route a dramatic coastal character out of all proportion to its short mileage. (canmore.org.uk)

As the route climbs toward Compass Hill and then Cnoc Bhrostan, the ascent is gradual overall, spread across the loop rather than concentrated in one long climb. With only around 100 m / 328 ft of total elevation gain, most walkers will find the effort manageable, but the combination of rough ground, boggy patches, and wind exposure can slow progress. The higher points are not mountains in scale, yet they offer excellent vantage points over the harbour, the cliffs, and the surrounding Small Isles seascape. Cnoc Bhrostan itself rises to about 140 m / 459 ft, so even a low summit here feels open and airy. (peakvisor.com)

Landmarks, history and landscape

The historical interest on this loop is unusually strong for such a short outing. Coroghon Castle is recorded as a small prison-like tower built on the side of an isolated stack, and later descriptions emphasized how precarious and inaccessible it appeared. Its position alone makes it memorable, and it speaks to the island’s long, layered human story of defence, control, and settlement on a remote Atlantic edge. (canmore.org.uk)

Beyond the castle, the slopes around Cnoc Bhrostan and Compass Hill preserve traces of older land use. Historic environment records describe surviving lazy-bed cultivation, enclosures, and probable shieling huts in the Coroghon area, showing that this landscape was once worked far more intensively than it appears today. An 1805 estate map recorded the farm of Coroghon here, and the wider archaeological landscape reflects changing agricultural patterns and later depopulation. (her.highland.gov.uk)

That wider history is tied to the upheavals of the Highland Clearances. Records for Canna note that the great clearance of 1851 brought especially dramatic change, with tenants removed and long-inhabited settlement areas such as A’ Chill destroyed. Walking this loop, the open graz