Rising to 787 metres, Arkle is a striking quartzite mountain located north of Loch Stack in Sutherland. Its pale, shattered ridges and steep flanks make it one of the most visually distinctive peaks in the Northwest Highlands. Unlike its neighbours formed from ancient Lewisian gneiss, Arkle is composed of younger Cambrian quartzite, giving it a unique geological character and a gleaming appearance in sunlight.

The ascent typically begins from the roadside near Loch Stack, with a rough and pathless climb through heather and rocky terrain. Though not a Munro, Arkle offers a rewarding challenge for experienced walkers and is often paired with Foinaven for a longer expedition. The summit provides breathtaking views across the wild moorlands, lochs, and distant peaks, while the roadside vantage point below is a favourite among photographers and passing travellers.

Wildlife enthusiasts may spot black-throated divers, greenshanks, dippers, curlews, and snipe near Loch Stack, adding to the area’s natural charm.

Good to Know

Distance: 17.5km / 11 miles return

Grade: Challenging hill walk

Time: 6–7 hours depending on conditions

Start Point: Layby near Loch Stack on the A838

Weather: Best enjoyed on a clear day – views are a major highlight

Navigation: No marked paths – map and compass essential

Photo Tip: Capture Arkle’s gleaming quartzite ridges from the roadside or summit, with views toward Foinaven, Ben Stack, and Loch Stack

Find full route details on Walk Highlands.