Blawhorn Moss is a raised bog located to the northwest of the village of Blackridge, about 6 kilometres (3.7 mi) west of Armadale in the council area of West Lothian in central Scotland. It is the largest and least disturbed raised bog in the Lothians, and has been a National Nature Reserve since 1980. It is owned and managed by NatureScot, the public body responsible for Scotland's natural heritage.