U S Government Offices--bureau Of Land Management Pompeys Pillar, Ballantine Worden, MT 59088 Phone : (406) 967-6913 Business Category Government Offices-Federal Government Offices & Public Schools U S Government Offices--post Offices, Ballantine Worden, MT 59088 Phone : (406) 967-6913 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Post Office - Ballantine 1605 Ash St Ballantine, MT 59006 Phone : (406) 967-6913 Business Category Post Offices Toll-Free           (800) ASK-USPS