Beinn a' Bheithir

Infobox Mountain
Name = Beinn a'Bheithir - Sgorr Dhearg
Photo = Beinn aBheithir.jpg
Caption = Beinn a' Bheithir seen from the slopes of Mam na Gualainn, across Loch Leven. Sgorr Dhearg is the left-hand peak.
Elevation = 1,024 m (3,360 ft)
Location = Glen Coe, Scotland
Prominence = 729 m
Parent peak = Bidean nam Bian
Coordinates =
Topographic
OS "Landranger" 41
Easiest route = hike
Grid_ref_UK = NN056558
Listing = Marilyn, Munro
Translation = Red Rocky Peak
Language = Gaelic
Pronunciation = s̪kuːrˠ ʝɛɾak

GB summits entry
Name=Sgorr Dhonuill
Gridref=NN040555
Height=1001 m (3,284 ft)
Status=Marilyn, Munro

Beinn a' Bheithir (IPA2|peɲəˈvehɪɾʲ, Gaelic for "Mountain of the Thunderbolt") is a mountain lying to the south of Ballachulish, on the south side of Loch Leven in the Scottish Highlands. It boasts two Munro summits: the higher peak Sgorr Dhearg lies about 2 km east of Sgorr Dhonuill (Sgurr Dhòmhnaill).

The mountain forms a horseshoe shape, with ridges pointing north enclosing the corrie of Gleann a' Chaolais (Glenachulish). The lower slopes on this side are cloaked in conifer plantations. To the south the mountain forms a steep ridge forming the northern wall of Glen Duror, which is also forested.

There are several routes up Beinn a' Bheithir. One of the simplest is to head through the forestry up Gleann a' Chaolais, reaching the 757 m high bealach between the two summits. Both summits can be bagged from here, and the walker may descend by the route of ascent.

Other routes on include the north and northwest ridges of Sgorr Dhearg, or a steep ascent from Glen Duror.