Lough Barra Bog is a blanket bog, Ramsar site and national nature reserve of approximately 436 acres (1.76 km2) in County Donegal.

Lough Barra Bog was legally protected as a national nature reserve by the Irish government in 1987.

[2] The Bog is a lowland blanket bog in the upper Gweebarra river valley on the southern edge of Glenveagh National Park.

[3] It provides a habitat for three bird species protected under the EC Bird Directive, Greenland white-fronted Goose, merlin and golden plover.

The reserve contains many flushes, small pools, and some remaining native deciduous woodland, predominantly made up of Quercus petraea.