Loch Mullardoch is a major reservoir in Glen Cannich in the Northwest Highlands of Scotland. It was created by the damming in 1951 of the River Cannich just upstream of Mullardoch House, as part of the Affric-Beauly hydro-electric power scheme. A car park at the southern end of the dam is the terminus of the public road up Glen Cannich. The reservoir extends for about 14 km westwards up the glen to the point where the Abhainn a Choilich and Abhainn Sithidh burns drop down from the West Benula deer forest.