List of tunnels in Montana

There are 27 named tunnels in Montana. A tunnel is an underground passageway, completely enclosed except for openings for egress, commonly at each end. Tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal.




 * (four) Chicago, Milwaukee, St. Paul and Pacific Railroad (Milwaukee Road) tunnels, abandoned rail tunnels, Great Falls Line, from east to west:
 * Lacey Tunnel Number 3, abandoned rail tunnel, c. 1913, Milwaukee Road, Chouteau County, Montana, 47.54944°N, -110.91694°W, el. 3386 ft
 * Amphitheater Tunnel Number 4, abandoned rail tunnel, 1913, Milwaukee Road, Chouteau County, Montana, 47.55167°N, -110.92889°W, el. 3376 ft
 * Belt Creek Tunnel Number 5, abandoned rail tunnel, 1913, Milwaukee Road, Chouteau County, Montana, 47.55528°N, -110.94694°W, el. 3307 ft
 * Red Coulee Tunnel Number 6, abandoned rail tunnel, 1914, Milwaukee Road, Cascade County, Montana, 47.55389°N, -110.95417°W, el. 3287 ft
 * Beavertail Tunnel, rail tunnel, near I-90 interchange 130 in Missoula County, Montana, 46.72389°N, -113.58306°W, el. 3691 ft
 * Bighorn Tunnel, abandoned rail tunnel, 1882-1952, near I-94 interchange 49 in Yellowstone County, Montana, 46.14417°N, -107.51972°W, el. 2835 ft
 * (two) Bozeman Tunnels, rail tunnels, under I-90 at Bozeman Pass in Gallatin County, Montana, 45.66583°N, -110.80806°W, el. 5738 ft
 * abandoned rail tunnel, 1884-c. 1945, Northern Pacific Railway
 * active rail tunnel, 1945, Montana Rail Link (formerly Northern Pacific Railway)
 * Flathead Tunnel, rail tunnel, 1970, BNSF Railway (formerly Burlington Northern Railroad and Great Northern Railway) in Lincoln County northwest of Kalispell
 * Helena Valley Canal Tunnel, water tunnel, east of Helena in Lewis and Clark County, Montana, 46.64306°N, -111.75556°W, el. 4035 ft
 * John Tunnel, rail tunnel, in Sanders County, Montana northwest of Missoula, 47.335°N, -114.78667°W, el. 2680 ft
 * Monitor Tunnel, abandoned rail tunnel, in Butte, Silver Bow County, Montana, 46.02333°N, -112.47556°W, el. 6361 ft
 * Mullan Tunnel, rail tunnel, c. 1883, Montana Rail Link (formerly Northern Pacific Railway), under the Continental Divide at Mullan Pass, northwest of Helena between Lewis and Clark County, Montana and Powell County, Montana, 46.63639°N, -112.30833°W, el. 5830 ft
 * (two) Nimrod Tunnels, rail tunnels, adjacent to I-90 in Granite County, Montana southeast of Missoula, 46.70972°N, -113.51556°W, el. 3681 ft
 * abandoned rail tunnel, in use 1908-1980, Chicago, Milwaukee, St. Paul & Pacific Railroad Tunnel Number 15
 * active rail tunnel, 1882, BNSF Railway (formerly Montana Rail Link and Northern Pacific Railway)
 * Painted Robe Tunnel, rail tunnel, in Golden Valley County, Montana northwest of Billings, 46.19472°N, -108.94222°W, el. 3763 ft
 * Ptarmigan Tunnel, pedestrian tunnel, 1930, in Glacier National Park, Glacier County, Montana, 48.84917°N, -113.70778°W, el. 7100 ft
 * St. Paul Pass Tunnel/Taft Tunnel, abandoned rail tunnel, in use 1908-1980, Chicago, Milwaukee, St. Paul & Pacific Railroad Tunnel Number 20, between Mineral County, Montana and Shoshone County, Idaho, now part of Milwaukee Road Rail Trail, 47.39028°N, -115.64861°W, el. 5141 ft
 * Schurchs Tunnel, Powell County, Montana, 46.28917°N, -112.56333°W, el. 7424 ft
 * Toston Canal Tunnel, water tunnel, Broadwater County, Montana, between Helena and Bozeman, 46.12667°N, -111.44222°W, el. 4209 ft
 * (two) rail tunnels, on the other side of the Missouri River from I-15, from east to west:
 * Tunnel Number 1, rail tunnel, on the other side of the Missouri River from interchange 244 on I-15 in Cascade County, Montana, 47.15917°N, -111.83111°W, el. 3504 ft
 * Tunnel Number 3, rail tunnel, on the other side of the Missouri River from Mile Marker 237 on I-15 in Lewis and Clark County, Montana, 47.10889°N, -111.95083°W, el. 3592 ft
 * Tunnel Number 1, former rail tunnel, possibly either bypassed or daylighted, just north of interchange 324 on I-90 in Park County, Montana, 45.66444°N, -110.73417°W, el. 5371 ft
 * (two) adjacent rail tunnels along US 2 adjacent to Glacier National Park in Flathead County, Montana, from south to north:
 * Tunnel Number 2, rail tunnel, 48.36833°N, -113.67528°W, el. 3734 ft
 * Tunnel Number 3, rail tunnel, 48.37306°N, -113.68194°W, el. 3783 ft
 * Two Leggins Canal Tunnel, water tunnel, in Big Horn County, Montana north of Hardin, 45.97278°N, -107.53694°W, el. 2789 ft
 * Vista Tunnel, former rail tunnel, either bypassed or daylighted, northwest of Whitefish in Flathead County, Montana, 48.47139°N, -114.4425°W, el. 3179 ft
 * Wayne Tunnel, rail tunnel, 1911, BNSF Railway (formerly Great Northern Railway), southeast of Great Falls in Cascade County, Montana, 47.43917°N, -110.94306°W, el. 3779 ft
 * Wickes Tunnel/Boulder Tunnel, abandoned rail tunnel, Great Northern Railway, north of Boulder in Jefferson County, Montana, 46.33°N, -112.11333°W, el. 6224 ft