Idaho Code § 6-105

In all actions to foreclose a mortgage or other lien upon real property, where such real property is situated partly in one county and partly in another county, within the state of Idaho, the sheriff of the county in which such action is commenced and where the decree therein is rendered and entered, shall have the power and it is hereby made his duty to enforce execution issued upon such decree in the same manner as if the whole of such real property was situated in the county in which such action was commenced and where the decree therein was rendered and entered.