Frost line depth in Saratoga County, NY
How deep the ground freezes in Saratoga County, NY
33 in. Dig to 34 in, just below the frost. Nearest NOAA station: Saratoga Springs 4 Sw, 4.8 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.