Flanders Moss (Scottish Gaelic: A’ Mhòine Fhlànrasach)[3] is an area of raised bog lying in the Carse of Forth in west Stirlingshire, Scotland.

The eastern part of Flanders Moss is the largest raised bog in Europe to remain in a predominantly near-natural state.

[6] The bog is composed of an underlayer of sphagnum mosses, on top of which grows heather, cross-leaved heath and cotton-grass.

[12] There are a number of other archaeological sites surrounding the moss, many of which consist of ditches, peat banks and dams used to drain the land to improve it for agriculture.

[1] NatureScot owns 108 hectares (270 acres) of the reserve, and manage the remaining area via agreements or leases with the other 4 private landowners.

NatureScot is seeking to reverse the drying effect of historical ditch construction, peat removal and tree growth.

There is an access track leading to a car park on the eastern side of the site; here there is a viewing tower and a short (900 m) waymarked trail.