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 )
|
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)
|
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)
|
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)
|
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)
|
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
|
|