Interstate 15 South - Sweet Grass to Shelby

Interstate 15 commences south from the U.S. Customs Station at a folded diamond interchange (Exit 397) with S-214 at 2nd Street and 3rd Avenue in Sweet Grass.
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Unmarked on guide signs for Exit 397, S-214 ties into Interstate 15 along Loop Road east from Hillside Colony. The secondary highway runs 32.83 miles west from 3rd Avenue and I-15 to S-213 near Santa Rita.
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Interstate 15 is the Veteran's Memorial Highway in Montana. This sign stands along the southbound entrance ramp from S-214 at 2nd Street and Loop Road in Sweet Grass.
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The first reassurance marker for Interstate 15 south.
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Interstate 15 in Toole County is also the First Special Service Force Memorial Highway.
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Middle Butte and East Butte of the Sweetgrass Hills.
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