AMP: 20 Location: US-212 at the Montana State Line, Crook Cty Welcome to Wyoming! WYDOT will maintain this 20 mile stretch of road from Montana to South Dakota, not intersecting any other numbered highways AMP: 20 Location: US-212 at the Montana State Line, Crook Cty Reassurance shield as we enter Wyoming AMP: 18 Location: US-212 … Continue reading U.S. Route 212, MT State Line to SD State Line