Location |
State(s) |
Elevation |
Built by |
Currently |
Years of operation |
Notes |
Marias Pass |
Montana |
5,213 ft (1,589 m) |
Great Northern Railway |
BNSF Railway |
1893–present |
Hi-Line |
Mullan Pass |
Montana |
5,566 ft (1,697 m) |
Northern Pacific Railroad |
Montana Rail Link |
1883–present |
Passes through the Mullan Tunnel |
Elk Park Pass |
Montana |
6,365 ft (1,940 m) |
Great Northern Railway |
Burlington Northern Railroad |
1888–1972 |
|
Homestake Pass |
Montana |
6,328 ft (1,929 m) |
Northern Pacific Railroad |
BNSF Railway |
1888–present (dormant since 1983) |
|
Pipestone Pass |
Montana |
6,347 ft (1,935 m) |
Chicago, Milwaukee, St. Paul and Pacific Railroad |
Chicago, Milwaukee, St. Paul and Pacific Railroad |
1909–1980 |
Passed through the Pipestone Pass Tunnel |
Deer Lodge Pass |
Montana |
5,801 ft (1,768 m) |
Utah and Northern Railway |
Union Pacific Railroad |
1881–present |
Narrow gauge until 1887; railroad name Feely |
Bannock Pass |
Montana and Idaho |
7,575 ft (2,309 m) |
Gilmore and Pittsburgh Railroad |
Gilmore and Pittsburgh Railroad |
1910–1939 |
Tunnel at summit |
Monida Pass |
Montana and Idaho |
6,823 ft (2,080 m) |
Utah and Northern Railway |
Union Pacific Railroad |
1880–present |
Narrow gauge until 1886 |
Reas Pass |
Montana and Idaho |
6,930 ft (2,112 m) |
Union Pacific Railroad |
Union Pacific Railroad |
1905–1981 |
Branch to West Yellowstone |
South Pass |
Wyoming |
7,420 ft (2,262 m) |
U.S. Steel |
U.S. Steel |
1962–1983 |
Served U.S. Steel Atlantic City Ore Mine |
Robinson |
Wyoming |
6,940 ft (2,115 m) |
Union Pacific Railroad |
Union Pacific Railroad |
1868–present |
Two sides of the Great Divide Basin; Robinson is the true Divide (per USGS) |
Hadsell |
Wyoming |
6,930 ft (2,112 m) |
Rollins Pass |
Colorado |
11,660 ft (3,554 m) (1904), 9,239 ft (2,816 m) (1928) |
Denver, Northwestern and Pacific Railway |
Union Pacific Railroad |
1904–present |
Original alignment replaced in 1928 by the Moffat Tunnel [1]) |
Jones Pass |
Colorado |
8,964 ft (2,732 m) |
Henderson Mine |
|
1976–1999 |
Narrow gauge, passed through the Henderson Tunnel; replaced by a conveyor belt; elevation is for west (and only) portal |
Boreas Pass |
Colorado |
11,493 ft (3,503 m) |
Denver, South Park and Pacific Railroad |
Colorado and Southern Railway |
1882–1937 |
Narrow gauge |
Fremont Pass |
Colorado |
11,319 ft (3,450 m) |
Denver, South Park and Pacific Railroad |
Colorado and Southern Railway |
1884–1937 |
Narrow gauge. Line south of Climax retained, converted to standard gauge 1943, now operated by Leadville, Colorado and Southern Railroad |
Fremont Pass |
Colorado |
11,330 ft (3,453 m) |
Denver and Rio Grande Railroad |
Denver and Rio Grande Western Railroad |
1881–1923 |
Narrow gauge |
Tennessee Pass |
Colorado |
10,424 ft (3,177 m) [2] |
Denver and Rio Grande Railroad |
Denver and Rio Grande Railroad |
1887–1890 |
Narrow gauge, replaced by standard gauge Tennessee Pass Tunnel |
Tennessee Pass |
Colorado |
10,239 ft (3,121 m) (1890), 10,221 ft (3,115 m) (1945) [3] |
Denver and Rio Grande Railroad |
Union Pacific Railroad (dormant) |
1890–present (dormant since 1997) |
Passed through the Tennessee Pass Tunnel (original tunnel built 1890, replaced in 1945) |
Hagerman Pass |
Colorado |
11,528 ft (3,514 m) (1887),10,953 ft (3,338 m) (1893) |
Colorado Midland Railway |
Colorado Midland Railway |
1887–1918 |
Passed through the Hagerman Tunnel, replaced in 1893 by the Busk-Ivanhoe Tunnel. Reverted to original route between 1897 and 1899 |
Alpine Tunnel |
Colorado |
11,612 ft (3,539 m) |
Denver, South Park and Pacific Railroad |
Colorado and Southern Railway |
1881–1910 |
Narrow gauge |
Marshall Pass |
Colorado |
10,856 ft (3,309 m) [4] |
Denver and Rio Grande Railroad |
Denver and Rio Grande Western Railroad |
1881–1953 |
Narrow gauge. Original D&RG mainline before Tennessee Pass line opened |
Azotea |
New Mexico |
7,773 ft (2,369 m) [5] |
Denver and Rio Grande Railroad |
Denver and Rio Grande Western Railroad |
1880–1968 |
Narrow gauge |
Hillcrest |
New Mexico |
7,714 ft (2,351 m) |
Rio Grande and Southwestern Railroad |
Rio Grande and Southwestern Railroad |
1903–1924 |
Narrow gauge |
Campbell Pass |
New Mexico |
7,244 ft (2,208 m) |
Atchison, Topeka and Santa Fe Railway |
BNSF Railway |
1882–present |
|
Tyrone |
New Mexico |
5,990 ft (1,826 m) |
Burro Mountain Railroad |
Southwestern Railroad |
|
Serves Phelps Dodge copper pit; short tunnel under Divide |
Wilna |
New Mexico |
4,584 ft (1,397 m) |
Southern Pacific Railroad |
Union Pacific Railroad |
1883–present |
Lordsburg Subdivision |
Hachita |
New Mexico |
4,495 ft (1,370 m) |
Arizona and New Mexico Railroad |
Southern Pacific Railroad |
1902–1934 |
|
Vista |
New Mexico |
4,650 ft (1,417 m) (east), 4,694 ft (1,431 m) (west) |
El Paso and Southwestern Railroad |
Southern Pacific Railroad |
1902–1961 |
Two crossings 2 miles apart |
(name unknown) |
New Mexico |
4,525 ft (1,379 m) |
Phelps Dodge |
Phelps Dodge |
1970s–1999 |
Line served Hidalgo Smelter |
Antelope |
New Mexico |
4,510 ft (1,375 m) |
El Paso and Southwestern Railroad |
Southern Pacific Railroad |
1902–1961 |
|