From Helena to Sweetgrass at the Canadian border, Interstate 15 is dedicated as a memorial highway to the First Special Service Force.
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The freeway goes through the forest and plains north of I-90 before winding along Bison Creek and later the Boulder River.
Montana | Interstate 75 | Interstate 90 | Interstate 5 | Hannah Montana | Interstate 94 | Helena, Montana | Interstate 81 | Interstate 80 | Interstate 70 | Great Falls, Montana | Interstate 40 | Interstate 95 | Interstate 10 | Interstate 65 | Interstate 64 | Interstate 44 | Billings, Montana | Interstate 90 in Minnesota | Missoula, Montana | Interstate 71 | Interstate 35 | Interstate 15 | Interstate 476 | Montana State University | Joe Montana | Kalispell, Montana | Interstate 78 | Interstate Highway System | Interstate 85 |