Meall Donn, Beinn Bhreac, Mullach Buide and Beinn Bharrain Loop

This difficult hill circuit on Arran’s quieter west side links Meall Donn, Beinn Bhreac, Mullach Buide, and the broader mass of Beinn Bharrain in a rugged loop of roughly 11 km / 6.8 miles with about 900 m / 2,950 ft of ascent. The route sits above Pirnmill on the Isle of Arran, with the usual start near the village parking area opposite the shop and café, close to the signed footpath leaving the road at Pirnmill, North Ayrshire, Scotland. Walkhighlands gives the closely related Pirnmill Hills circuit a start at grid reference NR872441 and notes parking in Pirnmill opposite the shop and café, along with a total ascent of 892 m. (walkhighlands.co.uk)

The outing is demanding less because of technical climbing throughout and more because of the combination of steep ground, rough moorland, bog, exposed ridges, and a long cumulative climb from near sea level. Even if your version of the loop comes in a little shorter than the 14 km / 8.75 mile Walkhighlands circuit, the character remains the same: this is a serious hill day where weather, visibility, and underfoot conditions can change the effort level dramatically. The ridge sections around Beinn Bharrain and Mullach Buide can include awkward rocky steps, though some of the harder scrambling can be bypassed on easier lines. (walkhighlands.co.uk)

Getting to the start

By car, the simplest approach is to reach Arran by CalMac ferry to Brodick from Ardrossan or, depending on current service arrangements, Troon, then drive the island road north and west to Pirnmill. CalMac’s current route information notes Arran sailings on the Ardrossan–Brodick route, while also warning that alternative sailings and diversions can apply, including Troon–Brodick and Claonaig–Lochranza options. (calmac.co.uk)

By public transport, the usual mainland rail connection is to Ardrossan Harbour station, which serves the ferry terminal, then onward by ferry to Brodick. From Brodick, Stagecoach’s 324 bus serves the west side of Arran and runs through Corrie, Sannox, Lochranza, Catacol, and Pirnmill, making the walk one of the more accessible west-coast hill days on the island if ferry and bus times line up. Because ferry operations on Arran can change seasonally or at short notice, it is worth checking both ferry status and bus times before travel. (scotrail.co.uk)

What the route feels like

The opening section usually begins on a clear signed path climbing away from Pirnmill through birch woodland and then onto open moor. Early on, the walking can feel deceptively gentle, but the ground is often muddy and wet, with stiles, burns, and peaty sections slowing progress. One of the first memorable features is the line of waterfalls on the Allt Gobhlach, which adds a dramatic note before the route leaves the lower path network and commits to the hills. Walkhighlands specifically mentions views of waterfalls near the burn and a more scenic path option compared with the hydro track alternative. (walkhighlands.co.uk)

Once above the trees, the route becomes more exposed and more committing. The climb toward Beinn Bharrain