It is a Special Area of Conservation within the UK, bordered by Beinn Bhuidhe on the Glen Fyne side.

Shira runs into the 5 MW Sròn Mòr (Big Nose) power station dam,[2] and then for about seven miles (eleven kilometres) down to and through Loch Dubh (Black Lake) at the base.

Argyll negotiated an amnesty and protection for Rob in 1716, and granted him permission to build a house in upper Glen Shira after disarmament.

Records suggest that Rob Roy also constructed a fank for sheep or cattle in the Glen.

However, some time after the 1719 Jacobite Rebellion — likely around 1720 — Rob moved to Monachyle Tuarach by Loch Doine, abandoning the structures.