AMP: 83 Location: US 212 and MT-59, Powder River Cty Just after S-398, Montana 59 will split. AMP: 83 Location: US 212 and MT-59, Powder River Cty Follow 212 east to Alzada, Mont. and Belle Fourche, S.D. Take 59 south to Gillette, Wyo. 59 is a multi-state route that will continue as WYO 59. AMP: 83 Location: US … Continue reading U.S. Route 212, S-398 to MT-59