South Mountain (French: Montagne du Sud; Gaelic: Beinn a Deas) is a Canadian range on the mainland portion of Nova Scotia. A granitic ridge stretching from the Annapolis Basin to Mount Uniacke, it forms the southern edge of the Annapolis Valley and shelters the valley from the climate effects of the pelagic coast along the Atlantic Ocean. Together with North Mountain, the two ranges form the Annapolis Highlands region.