AMP: 75
Location: I-90 and I-90 Business, Mineral Cty
Reassurance shield after the business loop split.
AMP: 76
Location: I-90 and Petty Creek Rd, Mineral Cty
Just after that, we’ll approach the other end of I-90 Business, now signed as S-507.
AMP: 77
Location: I-90 and Petty Creek Rd, Mineral Cty
Exit for S-507/I-90 Business as we enter Missoula County. This is the eastern terminus of both of those highways.
