Loch Dubh is a lochan on the Duchray Water in the western part of Loch Ard Forest in the Central Highlands of Scotland. Loch Dubh nestles in a wooded valley called Gleann Dubh at a height of about 140 metres above sea level. It is 4 kilometres east of Scotland's most popular Munro, Ben Lomond, one kilometre south of Beinn Dubh, 1½ kilometres northeas…Loch Dubh is a lochan on the Duchray Water in the western part of Loch Ard Forest in the Central Highlands of Scotland. Loch Dubh nestles in a wooded valley called Gleann Dubh at a height of about 140 metres above sea level. It is 4 kilometres east of Scotland's most popular Munro, Ben Lomond, one kilometre south of Beinn Dubh, 1½ kilometres northeast of Beinn Bahn and five kilometres west northwest of Kinlochard near the head of Loch Ard.