Last Driven August 2020 AMP: 13 Location: MT-55 and I-90, Jefferson Cty As Montana 55 begins, stay straight for 55 south to Montana 69. AMP: 12 Location: Whitehall St and I-90, Whitehall A few feet later, we’ll enter Whitehall. AMP: 12 Location: Whitehall St and 1st St, Whitehall A few blocks later, we’ll approach Montana … Continue reading Montana Highway 55, I-90/S-399 to MT-2/MT-69