Invereshie and Inshriach (Scottish Gaelic: Inbhir Fheisidh agus Na h-Innse Riabhaich) is a national nature reserve on the western flank of the Cairngorms in the Highland council area of Scotland. The reserve covers habitats at a range of different altitudes, ranging from Caledonian Forest beside the River Feshie in the west, via bog and open moorland, to an arctic-alpine environment on the Cairngorm plateau. The Munro summit of Sgòr Gaoith (1118 m) lies on the eastern boundary of the reserve. The forested areas of the reserve form part of an expanse of Caledonian pinewood that stretches from Glen Feshie to Abernethy, and which as a whole forms the largest single area of this habitat remaining in Scotland. The reserve is owned and managed jointly by NatureScot and Forestry and Land Scotland