The Brodie Mountain ridge is located in the towns of Hancock, Lanesborough, New Ashford, and Williamstown, Massachusetts. It is bordered to the northeast by Mount Greylock, to the south by Potter Mountain; and to the west by Misery Mountain. The southwest side drains into Kinderhook Creek, thence the Hudson River and Long Island Sound; the northwest side into the West Branch of the Green River, the Green River, the Hoosic River, thence the Hudson River; the northeast side into East Brook, thence Green River; and the southeast side into Town Brook, the West Branch of the Housatonic River, thence the Housatonic River and Long Island Sound. The mountain is forested in northern hardwood species; its geology is Ordovician phyllite.