| State or Territory
|
Route
|
Location
|
Summit Elevation
|
Coordinates
|
Length
|
Maximum Grade
|
Runaway Truck Ramps
|
Comments
|
| Arizona
|
Interstate 17
|
Southbound from Munds Park
|
6378 ft (1944 m)
|
34°48'35.7"N 111°36'21.2"W
|
18 miles (29.0 km)
|
6%
|
1
|
|
| Arizona
|
Interstate 17
|
Northbound into Verde Valley
|
4723 ft (1440 m)
|
34°31'58.6"N 111°57'49.9"W
|
7 miles (11.3 km)
|
6%
|
1
|
|
| Arizona
|
U.S. Route 60 / State Route 77
|
Eastbound into Salt River Canyon
|
4830 ft (1472 m)
|
33°46'10.6"N 110°30'38.8"W
|
5 miles (8.0 km)
|
6%
|
1
|
|
| Arizona
|
U.S. Route 60 / State Route 77
|
Westbound into Salt River Canyon
|
4927 ft (1502 m)
|
33°49'39.0"N 110°27'23.9"W
|
5 miles (8.0 km)
|
6%
|
0
|
|
| Arizona
|
State Route 89A
|
Southbound into Oak Creek Canyon
|
6545 ft (1995 m)
|
35°02'19.6"N 111°44'00.7"W
|
3 miles (4.8 km)
|
7%
|
0
|
Multiple sharp switchbacks
|
| California
|
Interstate 5
|
Grapevine; Northbound from Tejon Pass
|
4144 ft (1263 m)
|
34°52'19.7"N 118°53'21.8"W
|
5 miles (8.0 km)
|
6%
|
2
|
|
| California
|
Interstate 5
|
Five Mile Grade; Sounthbound from Violin Summit
|
2589 ft (789 m)
|
34°33'38.2"N 118°40'48.9"W
|
5 miles (8.0 km)
|
5%
|
0
|
Unique left-hand driving configuration with crossovers and top and bottom of grade
|
| California
|
Interstate 8
|
In-Ko-Pah Gorge; Eastbound from Jacumba Hot Springs
|
3000 ft (914 m)
|
32°38'13.2"N 116°06'51.6"W
|
7 miles (11.3 km)
|
6%
|
1
|
Strong wind hazard. Westbound traffic ascends Devil's Canyon up to 1.5 miles away.
|
| California
|
State Route 108
|
Eastbound from Sonora Pass
|
9624 ft (2933 m)
|
38°19'39.6"N 119°38'12.4"W
|
12 miles (19.3 km)
|
26%
|
0
|
Subject to winter closures. Trucks over 38 feet from kingpin to rear axle prohibited, over 30 feet not advised.
|
| California
|
State Route 4
|
Eastbound from Ebbets Pass
|
8736 ft (2663 m)
|
38°32'40.1"N 119°48'42.9"W
|
25 miles (40.2 km)
|
24%
|
0
|
Single lane with turnouts. Not maintained in winter. Vehicles over 25 feet long not advised.
|
| Colorado
|
Interstate 70
|
Clear Creek Canyon, eastbound from Eisenhower Tunnel
|
11,112 ft (3387 m)
|
39°40'54.0"N 105°53'39.4"W
|
12 miles (19.3 km)
|
6%
|
1
|
Highest elevation on U.S. Interstate Highway system
|
| Colorado
|
Interstate 70
|
Eastbound from Genesee Park
|
7740 ft (2359 m)
|
39°42'36.0"N 105°17'39.8"W
|
5 miles (8.0 km)
|
6%
|
1
|
|
| Colorado
|
Interstate 70
|
Westbound from Eisenhower Tunnel
|
11,112 ft (3387 m)
|
39°40'44.2"N 105°56'07.7"W
|
6 miles (9.7 km)
|
7%
|
2
|
Highest elevation on U.S. Interstate Highway system
|
| Colorado
|
U.S. Route 160
|
Eastbound from Wolf Creek Pass
|
10,857 ft (3309 m)
|
37°28'58.7"N 106°47'59.8"W
|
8 miles (12.9 km)
|
6%
|
0
|
Includes a snow shed and the Wolf Creek Pass Tunnel
|
| Colorado
|
U.S. Route 160
|
Westbound from Wolf Creek Pass
|
10,857 ft (3309 m)
|
37°28'58.7"N 106°47'59.8"W
|
9 miles (14.5 km)
|
7%
|
2
|
Hairpin curve 6 miles (9.7 km) from summit
|
| Colorado
|
U.S. Route 550 (Million Dollar Highway)
|
Northbound from Red Mountain Pass to Ouray
|
11,018 ft (3358 m)
|
37°53'55.0"N 107°42'43.7"W
|
13 miles (20.9 km)
|
8%
|
0
|
Narrow 2-lane highway with sharp curves and unguarded dropoffs, frequent avalanches
|
| Colorado
|
U.S. Route 550 (Million Dollar Highway)
|
Southbound from Red Mountain Pass
|
11,018 ft (3358 m)
|
37°53'55.0"N 107°42'43.7"W
|
10 miles (16.1 km)
|
8%
|
0
|
Narrow 2-lane highway with sharp curves and unguarded dropoffs, frequent avalanches
|
| California
|
Interstate 15
|
Southbound from Cajon Summit
|
4260 ft (1298 m)
|
32°38'13.2"N 116°06'51.6"W
|
4 miles (6.4 km)
|
6%
|
1
|
|
| California
|
Interstate 80
|
Eastbound from Donner Summit
|
7227 ft (2203 m)
|
39°20'29.5"N 120°20'24.0"W
|
5 miles (8.0 km)
|
6%
|
0
|
Subject to extreme snowfall
|
| California
|
Interstate 80
|
Westbound from Donner Summit
|
7227 ft (2203 m)
|
39°20'29.5"N 120°20'24.0"W
|
2 miles (3.2 km)
|
5%
|
0
|
Subject to extreme snowfall
|
| North Carolina
|
Interstate 26 / U.S. Route 74
|
Eastbound from Howard Gap
|
1900 ft (580 m)
|
35°14'57.5"N 82°16'29.7"W
|
3 miles (4.8 km)
|
6%
|
0
|
|
| North Carolina
|
Interstate 40 / U.S. Route 70
|
Old Fort Mountain, eastbound from Swannanoa Gap
|
2657 ft (810 m)
|
35°37'03.2"N 82°15'42.6"W
|
6 miles (9.7 km)
|
6%
|
3
|
Mandatory brake check at summit
|
| Oregon
|
Interstate 5
|
Northbound from Siskiyou Summit
|
4310 ft (1314 m)
|
42°03'43.1"N 122°36'21.4"W
|
7 miles (11.3 km)
|
6%
|
2
|
Highest point on Interstate 5
|
| Oregon
|
Interstate 5
|
Southbound from Siskiyou Summit
|
4310 ft (1314 m)
|
42°03'43.1"N 122°36'21.4"W
|
7 miles (11.3 km)
|
6%
|
1
|
Highest point on Interstate 5
|
| Oregon
|
Interstate 84
|
Cabbage Hill; Westbound from Deadman Pass
|
3609 ft (1100 m)
|
45°36′03″N 118°30′14″W
|
6 miles (9.7 km)
|
6%
|
1
|
|
| Washington
|
U.S. Route 2
|
Westbound from Stevens Pass
|
4061 ft (1238 m)
|
47°44'46.8"N 121°05'18.2"W
|
7 miles (11.3 km)
|
6%
|
0
|
40 MPH hairpin curve 4 miles from summit
|
| Washington
|
U.S. Route 12
|
Westbound from White Pass
|
4500 ft (1372 m)
|
46°38'14.8"N 121°23'33.8"W
|
4 miles (6.4 km)
|
6%
|
1
|
|
| Wyoming
|
U.S. Route 14
|
Shell Canyon, eastbound from Granite Pass
|
9033 ft (2753 m)
|
44°38'23.6"N 107°30'11.9"W
|
11 miles (17.7 km)
|
6%
|
1
|
|
| Wyoming
|
U.S. Route 14
|
Eastbound from Sibley Lake
|
7912 ft (2411 m)
|
44°47'26.3"N 107°23'37.3"W
|
12 miles (19.3 km)
|
8%
|
0
|
Mandatory brake check at summit. Multiple hairpin curves; trucks restricted to 20 MPH
|
| Wyoming
|
U.S. Route 14A
|
Medicine Wheel Passage, westbound from Burgess Junction
|
9083 ft (2768 m)
|
44°48'28.8"N 107°52'56.5"W
|
13 miles (20.9 km)
|
10%
|
3 ramps and one brake cooling turnout
|
Closed winters; Mandatory brake check at summit
|
| Wyoming
|
U.S. Route 212 (Beartooth Highway)
|
Eastbound from Beartooth Pass
|
10,947 ft (3336 m)
|
44°58'08.8"N 109°28'16.5"W
|
14 miles (22.5 km)
|
10%
|
0
|
Closed winters. Commercial traffic prohibited
|
| Wyoming and Montana
|
U.S. Route 212 (Beartooth Highway)
|
Westbound from Beartooth Pass
|
10,947 ft (3336 m)
|
44°58'08.8"N 109°28'16.5"W
|
18 miles (29.0 km)
|
10%
|
0
|
Closed winters. Commercial traffic prohibited
|
| Wyoming
|
State Route 22 (Teton Pass Highway)
|
Eastbound from Teton Pass
|
8431 ft (2570 m)
|
43°29'50.8"N 110°57'19.2"W
|
5 miles (8.0 km)
|
10%
|
2 (one with mechanical arrestor system)
|
Subject to winter closures at Idaho state line
|
