Loch A'an is a remote freshwater loch set deep within the central Cairngorms plateau, in the Cairngorms National Park, located in the eastern Highlands of Scotland. Loch A'an, also called Loch Avon, is the source of the River Avon. Loch A'an is oriented southwest–northeast and is bounded on three sides by precipitous mountains, cliffs and crags, with the North-East opening out to provide an outflow for the river through Glen Avon.