The U.S. state of Washington, located in the Pacific Northwest, has several major mountain ranges that are traversed various passes. The state is divided by the Cascade Range, which have the highest passes, and is also home to the Olympic Mountains, Selkirk Mountains, and Blue Mountains.
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Colorado is a state in the Mountain West sub-region of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains. Colorado is the eighth most extensive and 21st most populous U.S. state. The United States Census Bureau estimated the population of Colorado at 5,839,926 as of July 1, 2022, a 1.15% increase since the 2020 United States census.
Idaho is a state in the Pacific Northwest region of the United States. To the north, it shares a small portion of the Canada–United States border with the province of British Columbia. It borders the states of Montana and Wyoming to the east, Nevada and Utah to the south, and Washington and Oregon to the west. The state's capital and largest city is Boise. With an area of 83,570 square miles (216,400 km2), Idaho is the 14th largest state by land area, but with a population of approximately 1.8 million, it ranks as the 13th least populous and the 7th least densely populated of the 50 U.S. states.
Montana is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columbia, and Saskatchewan to the north. It is the fourth-largest state by area, the eighth-least populous state, and the third-least densely populated state. Its state capital is Helena, while the largest city is Billings. The western half of Montana contains numerous mountain ranges, while the eastern half is characterized by western prairie terrain and badlands, with smaller mountain ranges found throughout the state. The state has a reputation for a libertarian bent in popular opinion and policy.
Interstate 5 (I-5) is the main north–south Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific Coast of the contiguous U.S. from Mexico to Canada. It travels through the states of California, Oregon, and Washington, serving several large cities on the West Coast, including San Diego, Los Angeles, Sacramento, Portland, and Seattle. It is the only continuous Interstate highway to touch both the Mexican and Canadian borders. Upon crossing the Mexican border at its southern terminus, I-5 continues to Tijuana, Baja California, as Mexican Federal Highway 1 (Fed. 1). Upon crossing the Canadian border at its northern terminus, it continues to Vancouver as British Columbia Highway 99 (BC 99).
The Santa Monica Mountains is a coastal mountain range in Southern California, next to the Pacific Ocean. It is part of the Transverse Ranges. The Santa Monica Mountains National Recreation Area encompasses this mountain range. Because of its proximity to densely populated regions, it is one of the most visited natural areas in California.
State Route 14 is a north–south state highway in the U.S. state of California that connects Los Angeles to the northern Mojave Desert. The southern portion of the highway is signed as the Antelope Valley Freeway. The route connects Interstate 5 on the border of the city of Santa Clarita to the north and the Los Angeles neighborhoods of Granada Hills and Sylmar to the south, with U.S. Route 395 (US 395) near Inyokern. Legislatively, the route extends south of I-5 to SR 1 in the Pacific Palisades area of Los Angeles; however, the portion south of the junction with I-5 has not been constructed. The southern part of the constructed route is a busy commuter freeway serving and connecting the cities of Santa Clarita, Palmdale, and Lancaster to the rest of the Greater Los Angeles area. The northern portion, from Vincent to US 395, is legislatively named the Aerospace Highway, as the highway serves Edwards Air Force Base, once one of the primary landing strips for NASA's Space Shuttle, as well as the Naval Air Weapons Station China Lake that supports military aerospace research, development and testing. This section is rural, following the line between the hot Mojave desert and the forming Sierra Nevada mountain range. Most of SR 14 is loosely paralleled by a rail line originally built by the Southern Pacific Railroad, and was once the primary rail link between Los Angeles and Northern California. While no longer a primary rail line, the southern half of this line is now used for the Antelope Valley Line of the Metrolink commuter rail system.
State Route 152 is a state highway that runs from east to west near the middle of the U.S. state of California from State Route 1 in Watsonville to State Route 99 southeast of Merced. Its western portion provides access to and from Interstate 5 toward Southern California for motorists in or near Gilroy and San Jose.
State Route 542 (SR 542) is a 57.24-mile-long (92.12 km) state highway in the U.S. state of Washington, serving Mount Baker in Whatcom County. SR 542 travels east as the Mount Baker Highway from an interchange with Interstate 5 (I-5) in Bellingham through the Nooksack River valley to the Mt. Baker Ski Area at Austin Pass. It serves as the main highway to Mount Baker and the communities of Deming, Kendall, and Maple Falls along the Nooksack River. The highway was constructed in 1893 by Whatcom County as a wagon road between Bellingham and Maple Falls and was added to the state highway system as a branch of State Road 1 in 1925. The branch was transferred to Primary State Highway 1 (PSH 1) during its creation in 1937 and became SR 542 during the 1964 highway renumbering.
State Route 11 (SR 11) is a 21.28-mile (34.25 km) long state highway that serves Skagit and Whatcom counties in the U.S. state of Washington. SR 11, known as Chuckanut Drive, begins at an interchange with Interstate 5 (I-5) north of Burlington and continues northwest through several small towns and the Chuckanut Mountains to the Fairhaven district of Bellingham, where the highway turns east and ends again at I-5.
U.S. Route 50 (US-50) in Utah crosses the center of the state. The highway serves no major population centers in Utah, with the largest city along its path being Delta. Most of the route passes through desolate, remote areas. Through the eastern half of the state the route is concurrent with Interstate 70 (I-70). US-50 both enters and exits Utah concurrent with US-6, however the two routes are separate through the center of the state.
State Route 530 (SR 530) is a state highway in western Washington, United States. It serves Snohomish and Skagit counties, traveling 50.52 miles (81.30 km) from an interchange with Interstate 5 (I-5) southwest of Arlington past SR 9 in Arlington and Darrington to end at SR 20 in Rockport. Serving the communities of Arlington, Arlington Heights, Oso, Darrington and Rockport, the roadway travels parallel to a fork of the Stillaguamish River from Arlington to Darrington, the Sauk River from Darrington to Rockport and the Whitehorse Trail from Arlington to Darrington.
Washington, officially the State of Washington, is a state in the Pacific Northwest region of the Western United States. Named for George Washington—the first U.S. president—the state was formed from the western part of the Washington Territory, which was ceded by the British Empire in 1846, by the Oregon Treaty in the settlement of the Oregon boundary dispute. The state is bordered on the west by the Pacific Ocean, Oregon to the south, Idaho to the east, and the Canadian province of British Columbia to the north. It was admitted to the Union as the 42nd state in 1889. Olympia is the state capital; the state's largest city is Seattle.
U.S. Route 2 (US 2) is a component of the United States Numbered Highway System that connects the city of Everett in the U.S. state of Washington to the Upper Peninsula of Michigan, with a separate segment that runs from Rouses Point, New York, to Houlton, Maine. Within Washington, the highway travels on a 326-mile-long (525 km) route that connects the western and eastern regions of the state as a part of the state highway system and the National Highway System. US 2 forms parts of two National Scenic Byways, the Stevens Pass Greenway from Monroe to Cashmere and the Coulee Corridor Scenic Byway near Coulee City, and an All-American Road named the International Selkirk Loop within Newport.
State Route 971 (SR 971) is a state highway in the U.S. state of Washington. It runs for 15 miles (24 km) and primarily serves Lake Chelan State Park, with both of its termini at U.S. Route 97 Alternate (US 97A) southwest of Chelan. SR 971 has the highest highway number in the state.
Snoqualmie Pass is a mountain pass that carries Interstate 90 (I-90) through the Cascade Range in the U.S. state of Washington. The pass summit is at an elevation of 3,015 feet (919 m), on the county line between Kittitas County and King County.
U.S. Route 97 in the U.S. state of Washington is a 322-mile (518 km) route which traverses from the Oregon state line at the northern end of the Sam Hill Memorial Bridge in Maryhill, north to the Canada–US border in Okanogan County near Oroville. The highway serves major cities such as Goldendale, Yakima, Ellensburg and Wenatchee before continuing towards the Alaska Highway at the Yukon border as British Columbia Highway 97. Along the length of the roadway, US 97 is concurrent with State Route 14 in Maryhill, Interstate 82 (I-82) and US 12 between Union Gap and Ellensburg, I-90 briefly in Ellensburg, US 2 between Peshastin and rural Douglas County and SR 20 near Omak. An alternate route connects the highway with Chelan.
State Route 243 (SR 243) is a state highway in Grant County, Washington. It travels north–south along the Columbia River for 28 miles (45 km), connecting SR 24 at the Vernita Bridge to SR 26 near Vantage. The highway travels through a predominantly rural and desert area, serving two hydroelectric dams and the communities of Desert Aire, Mattawa, and Beverly.
U.S. Route 26 is a major cross-state United States highway with its western terminus in the U.S. state of Oregon, connecting U.S. Route 101 on the Oregon Coast near Seaside with the Idaho state line east of Nyssa. Local highway names include the Sunset Highway No. 47, Mount Hood Highway No. 26, and John Day Highway No. 5 before continuing into Idaho and beyond.
Cornelius Pass Road is an arterial road over Cornelius Pass in the Tualatin Mountains west of Portland, Oregon, United States, also extending several miles to the south. Running north–south, the road stretches between U.S. Route 30 (US 30) on the north and Kinnaman Street, just south of Oregon Route 8 (OR 8), on the south. The road passes through Washington and Multnomah counties, crossing the Tualatin Mountains at Cornelius Pass, 581 feet (177 m) above sea level. TriMet's MAX Light Rail line travels over the road on a bridge. The section between US 30 in Burlington and U.S. Route 26 in Hillsboro is Oregon Route 127 , known in the Oregon state highway system as Cornelius Pass Highway No. 127.
