| Secondary State Routes 401 to 500 |
Decommissioned routes shown in italics.
Description :
Runs from Molt to Canyon Creek
History / Notes :
An old MT 401 was replaced by MT 55
Description :
Runs from xx to Brockton
History / Notes :
Future
Description :
Runs from Froid to Bainville
History / Notes :
Future
Description :
Runs from Jct US 287 to Fairfield
History / Notes :
Future
Description :
Runs from Whitlash to Chester
History / Notes :
Future
Description :
Runs from Springhill Cemetary to Bozeman
History / Notes :
Future
Description :
Runs from xx to Bozeman
History / Notes :
Future
Description :
Runs from Jct MT 7 to Lamesteer NWR
History / Notes :
Future
Description :
Runs from Billings to xx
History / Notes :
Future
Description :
Runs from Jct US 2 to Jct MT 366
History / Notes :
Future
Description :
Runs from xx to Pryor
History / Notes :
Future
Description :
Runs from Jct MT 78 south of Absarokee to Limestone
History / Notes :
Future
Description :
Runs from Absarokee to Nye
History / Notes :
Future
Description :
Runs from Columbus to Joliet
History / Notes :
Future
Description :
Runs from Parsons Bridge to Silver Star
History / Notes :
Future
Description :
Runs from Skyles Lake to Kalispell
History / Notes :
Future
Description :
Runs from Fishtail to Roscoe
History / Notes :
Future
Description :
Runs from Kolin to Lewistown
History / Notes :
Future
Description :
Runs from Raynesford to Jct US 89 at Currie Spring
History / Notes :
Future
Description :
Runs from Judith Gap to xx
History / Notes :
Future
Description :
Runs from xx to Billings
History / Notes :
Future
Description :
Runs from Canyon Creek SP to Helena
History / Notes :
Future
Description :
Runs from Power to Fairfield
History / Notes :
Future
Description :
Runs from Rudyard to Big Sandy
History / Notes :
Future
Description :
Runs from Johnson Mountain to Wolf Creek
History / Notes :
Future
Description :
Runs from Augusta to Johnson Mountain
History / Notes :
Future
Description :
Runs from Radersburg to Jct US 287
History / Notes :
Future
Description :
Runs from Glentana to Nashua
History / Notes :
Future
Description :
Runs from Jct I-90 to Opprtunity
History / Notes :
Future
Description :
Runs from Jct MT 213 to Jct US 2 near Blackfoot
History / Notes :
Future
Description :
Runs from Hathaway to Forsyth
History / Notes :
Future
Description :
Runs from Rosebud to Ashland
History / Notes :
Part of old MT
Description :
Runs from Gildford to Box Elder
History / Notes :
Future
Description :
Runs from Gildford to Milk River
History / Notes :
Future
Description :
Runs from Garryowen to WY border south of Wyola
History / Notes :
Was US 87
Description :
Runs from Lake Helena to Helena
History / Notes :
Future
Description :
Runs from Helena to Unionville
History / Notes :
Future
Description :
Runs in Wyola from Jct MT 451 to Jct I-90 / US 87
History / Notes :
Future
Description :
Runs from Great Falls to Jct MT 226
History / Notes :
Future
Description :
Ran from Jct MT 200 near Paradise to St. Regis
History / Notes :
Replaced by MT 135
Description :
Runs from Jct MT 200 to Rock Springs
History / Notes :
Future
Description :
Runs from Lodge Grass to Jct near Willow Creek Dam
History / Notes :
Future
Description :
Runs from Babb to Browning
History / Notes :
Future
Description :
Runs from Jct MT 238 to Trout Hatchery
History / Notes :
Future
Description :
Runs from Circle to Lindsay
History / Notes :
Future
Description :
Runs from Bloomfield to Lindsay
History / Notes :
Future
Description :
Runs from Idaho border at to Thomson Falls
History / Notes :
Future
Description :
Runs from Trout Creek to Thomson Falls
History / Notes :
Old MT 200
Description :
Runs from Conner to Painted Rocks SP
History / Notes :
Future
Description :
Runs from Pray to Montanapolis Springs
History / Notes :
Future
Description :
Runs from NW of Big Timber to Big Timber
History / Notes :
Future
Description :
Runs from Libby to xx
History / Notes :
Future
Description :
Ran from Port of Del Bonita to Santa Rita
History / Notes :
Replaced by an extension of MT 213
Description :
Runs from Jct US 212 near Ashland to Fort Howe
History / Notes :
Future
Description :
Runs from Trailcreek to Columbia Falls
History / Notes :
Future
Description :
Runs from Banny On Mem. NRT to Whitefish
History / Notes :
Future
Description :
Runs from xx to Whitefish
History / Notes :
Future
Description :
Runs from Kinsey to Miles City
History / Notes :
Future
Description :
Runs from Plevna to Baker
History / Notes :
Future
Description :
Runs from Plevna to Willard
History / Notes :
Future
Description :
Runs from xx to Great Falls
History / Notes :
Future
Description :
Runs from Jct MT 16 to Bainville
History / Notes :
Future
Description :
Ran in Great Falls
History / Notes :
Replaced by Byp US 87
Description :
Ran along the north end of Hebgen Lake from Jct MT 287 to Jct US 191
History / Notes :
Replaced by US 287 in 1964
Description :
Runs from Mosby to Melstone
History / Notes :
Future
Go to Secondary State Routes up to 300 | Go to Secondary State Routes 301-400 | Go to Secondary State Routes 501 and up