| State Highways 101 - up |
Decommissioned routes shown in italics.
Description :
Ran from Opportunity to Drummond
History :
Replaced by Alt US 10 (1937-198x), then MT-1
Description :
Runs from Fort Peck to Nashua
History :
Old MT 249
Description :
Runs from Jct MT 200 near Paradise to St. Regis
History :
Was MT 461
Description :
Runs from Mineral Hill to Avon
History :
Future
Description :
Runs from Miles City to Cartersville
History :
Future
Description :
Ran from Wilsail to West Yellowstone
History :
Hoping for an extension of US 187?
Bozeman to West Yellowstone replaced by US 191 (1934)
Wilsail to Bozeman now MT 86
Description :
Ran from Jct US 10S at Sappington to Jct MT 187 at Grayling
History :
Was MT hoping for an extension of US 191?
Became MT-1 (1936-195x), now US 287
Description :
Runs from Fairview to Heron
Spur Route:
MT 200S Runs from Glendive to Circle
History :
196x - replaced MT-20, Alt US 10
Description :
Runs from Ennis to Twin Bridges
History :
Original MT 287 followed modern US 287 from West Yellowstone up to Chotaeu and then
continued to the Canadian Border at Piegan along with US 89, replacing MT 1 and MT 33
A 1959 earthquake caused a rockslide that closed the route north of Hebgen Lake,
and it was re-routed south of Hutchins Ranch thru Raynold's Pass
MT 287 was rerouted in 196x from Ennis to Sappington, bending to the west,
replacing MT 34, co-signing with MT 41 up to Silver Star, branching to the east to Whitehall
then re-connecting with MT 287 at Sappington
The old route became MT 287A
MT 287A was replaced by US 287 in 1964
US 287 also replaced MT 287 from Jct MT 499 to Ennis, and north of Sappington to Choteau, north of that was removed
Description :
Ran from Alberta border at Sweetgrass, south along I-15 / US 91 to Great Falls,
then southeast along US 87 to Billings, then southwest along US 212 to Laurel, then
to Wyoming border south of Warren along US 310
Major Cities :
Great Falls, Lewistown, Grassrange, Roundup, Billings, Laurel
History :
195x - Signed as part of Multi-State Route 789, not replacing existing signage
198x - Signage removed