Frost line depth in Elko County, NV
How deep the ground freezes in Elko County, NV
39 in. Dig to 39 in, just below the frost. Nearest NOAA station: Deeth, 6.7 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.