Frost line depth in Pike County, MO
How deep the ground freezes in Pike County, MO
25 in. Dig to 26 in, just below the frost. Nearest NOAA station: Bowling Green 1 E, 0.3 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.