AMP: 43 Location: Montana Ave and Boulder Ave, Helena Reassurance shield after the turn AMP: 44 Location: Montana Ave and 11th Ave, Helena A couple blocks later, turn left to continue east to I-15. Stay straight for the Capitol. AMP: 44 Location: Montana Ave and 11th Ave, Helena Turn left for US 12 east to … Continue reading U.S. Route 12, S-229 to I-15/I-15 Bus/US-287