Interstate 15 South - Montana to Roberts

Milepost 196 for I-15 in Idaho stands along southbound at the state line.
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Interstate 15 crosses Monida Pass southeast into Clark County, Idaho.
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Interstate 15 in Idaho is the Veterans Memorial Highway.
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Signal Peak appears on the southern horizon beyond the Idaho welcome sign.
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The unincorporated community of Spencer is 16 miles south of the Montana state line along Interstate 15.
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Old U.S. 91 spans the parallel Union Pacific Railroad line across a truss bridge south of Monida Pass.
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The first reassurance marker for Interstate 15 south in Idaho.
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I-15, Old U.S. 91 and the UP Railroad shift southward ahead of Modoc Creek.
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The diamond interchange at Exit 190 serves the adjacent unincorporated community of Humphrey.
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The bridge along Old U.S. 91 spanning Pleasant Valley Creek appears along the east side of Interstate 15 at Pleasant Valley.
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A subway takes Old Highway 91 across Interstate 15 south just ahead of milepost 187.
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Interstate 15 straddles the east side of Beacon Hill at milepost 182.
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The Clark County seat of Dubois is 12 miles south of Spencer.
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The Beaverhead Mountains appear far to the west.
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Originally a parclo B2 interchange, the ranch exit at Exit 172 is a parclo interchange.
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The Dubois Rest Area is an off-freeway facility located in Dubois adjacent to Exit 167 and W Main Street.
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Idaho Highway 22 stems west from the diamond interchange at Exit 167. The highway constitutes a 43.86 mile long route southwest to Idaho Highway 33 in Butte County.
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Omitted from the second guide sign for Exit 167, ID 22 west to ID 33 and U.S. 26 leads to U.S. 93 in the Butte County seat of Arco.
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Interstate 15 south enters Jefferson County beyond milepost 159.
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The unincorporated community of Hamer lies just east of Exit 150 at 2100 N and Old Butte Highway (Old U.S. 91).
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The western leg of Idaho Highway 33 stretches 78.11 miles between U.S. 26 at the south end of the Lemhi Range and the freeway along U.S. 20 at Rexburg.
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Mud Lake is a city 14 miles west of I-15. ID 28 branches northwest to U.S. 93 at Salmon from ID 33 just beyond Mud Lake.
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The Market Lake historical site lines the west side of Interstate 15 ahead of mile marker 142.
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ID 48 is a 24.40 mile long highway heading east from I-15 at Roberts to Menan, Lewisville, Rigby and U.S. 26 Business at Ririe.
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