Invereshie and Inshriach (Scottish Gaelic: Inbhir Fheisidh agus Na h-Innse Riabhaich)[3] is a national nature reserve on the western flank of the Cairngorms in the Highland council area of Scotland.

[8] The forest consists chiefly of Scots pine, with scattered examples of rowan, birch, aspen, alder, juniper and holly.

The forest floor hosts a wide array of plants, including heather, blaeberry and cowberry, and many species of mosses, lichens and fungi.

[9][10] Wood ants form an important part of the ecosystem of the Caledonian Forest, which also supports a wide range of other invertebrate life.

Although humans are known to have lived in the area since at least the Bronze Age, until around the mid-18th century the forest remained largely intact, with only small-scale felling of trees for domestic use and localised rough grazing.

From 1780, the Invereshie estate was managed by Captain John Macpherson (1751 - 1799, firstly on behalf of his father George (1702 - 1795), and then his older brother William (1733 - 1812).

There was also extensive construction of embankments to increase the grazing potential of the Invereshie Meadows on the floodplains of the Rivers Feshie and Spey.

The subsequent increase in deer numbers, alongside management practices such as muirburn (the burning of patches of heather to create habitats for grouse) led to a reduction in natural regeneration of the native woodland.

[19] In addition to being a national nature reserve (NNR), Invereshie and Inshriach lies within a number of other protected areas of Scotland.

[23] The Invereshie and Inshriach NNR is classified as a Category IV protected area by the International Union for Conservation of Nature.