Bidean nam Bian

Bidean nam Bian, at 1,150 metres, is the highest mountain in the old county of Argyll and the dominant peak of Glencoe, hidden from the road behind the famous Three Sisters ridges.

The most popular route starts from the car park near Achnambeithach, at the western end of Loch Achtriochtan. A path climbs into Coire nam Beitheach, following the western side of the burn up past a waterfall before scree slopes lead to the ridge crest, from where the intimidating-looking approach to the summit proves easier than it appears from below. The route continues over the minor top of Stob Coire nam Beith, then to Bidean's twin summit cairns, the eastern one marking the true top and the highest point in Argyll.

Most walkers extend the day along a fine ridge to Bidean's second Munro, Stob Coire Sgreamhach, before descending through the dramatic Lost Valley — Coire Gabhail — a hidden flat-floored hollow once used to hide rustled cattle, where the burn disappears underground for a stretch. The descent from the bealach into the Lost Valley is steep and loose, with a large snow patch often lingering well into summer.

The full round taking in both Munros is around 12 kilometres with substantial ascent, typically seven to nine hours for most parties.

This is steep, rocky, and complex terrain with sections of mild scrambling throughout, and Bidean nam Bian has a serious reputation for winter hillwalking and climbing accidents — the descent gully in particular holds snow long after it has cleared elsewhere, so should be avoided or treated with full winter equipment until confirmed clear.

Parking in Glen Coe at the Three Sisters or Achnambeithach car parks is free but fills early; buses between Glasgow, Fort William, and Skye stop nearby on the A82.