Frost line depth in Glacier County, MT

How deep the ground freezes in Glacier County, MT

52 in. Dig to 53 in, just below the frost. Nearest NOAA station: St Mary, 20.1 mi.

Your building department sets the legal frost line depth (IRC Table R301.2(1)); footings must go below it (R403.1.4.1). Call them before you dig.

Code depth · Method