Ben Oss - Geography

Geography

Ben Oss is especially craggy on its northern face, falling away steeply to the Cononish valley and barring any direct approach from this direction. It has two main ridges which connect to the adjacent Munros of Ben Lui and Beinn Dubhchraig and walkers usually arrive at the mountains summit along either of these. One ridge goes north east, east and then south east to form a curving edge around Coire Garbh connecting to Beinn Dubhchraig at the Bealach Buidhe with a height of 779 metres. Coire Garbh has Loch Oss lying within its recesses, a body of water measuring roughly 500 by 300 metres. Coire Buidhe stands on the northern side of this eastern ridge, this has a steep headwall and descents north from the bealach to the Cononish valley are not recommended.

Ben Oss’s other ridge goes south west to a col at the head of Coire Laoigh with a height of 687 metres which links to Ben Lui. Ben Oss’ southern slopes drop less steeply to Glen Falloch and the land at the head of Loch Lomond. Ben Oss lies on the drainage divide of Scotland, all rainfall that falls on the northern slopes drains to the Cononish valley which forms the headwaters of the River Tay and eventually goes to the east coast. Drainage from the southern slopes goes via Glen Falloch and Loch Lomond to reach the sea at the west coast at the Firth of Clyde.

Ben Oss alongside Ben Lui stand at the head of Glen Fyne, a contuation of the sea loch, Loch Fyne at 40 miles long in Argyll and Bute.