Montana Highway 3
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|---|---|
| Route information | |
| Maintained by MDT | |
| Length: | 221.770 mi (356.904 km) |
| Major junctions | |
| South end: |
 I‑90 in Billings
|
 US 12 from Lavina to Harlowton US 191 from Harlowton to Hobson US 87 in Hobson US 89 in ArmingtonUS 87 in Great Falls
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| North end: |
 I‑15 / US 89 in Great Falls
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| Highway system | |
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Montana State Highway 3 is a highway in central Montana extending north from Billings to Great Falls.
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Wikipedia