U.S. Highway 20 (US 20) is an east–west highway in central Oregon and southern Idaho. It splits into two sections. The first section runs from US 101 in Newport to OR 201 in Ontario. The second section runs from US 26 and Can-Ada Road in Nampa to Idaho Falls. In real life, US 20 is is the longest US route in the United States from Newport, Oregon, to Boston, Massachusetts, a distance of 3365 miles (5415 km).

Course[edit | edit source]

US begins in Newport, OR, at its intersection with US 101. It crosses the Central Oregon Coast Range, where a Page & Price Paper mill and a Deepgrove logging site branch from the road, before entering the Willamette Valley, where it intersects with Interstate 5 at Albany. The highway then crosses the Cascade Range via Tombstone Pass, where another Deepgrove logging site is located, and descends past Black Butte to Bend, where it intersects with US 97. The 20 runs below Pilot Butte out of Bend and enters the scrublands of the Harney Basin, a northern extension of the Great Basin. Past the ghost town of Millican and the rest area at Brothers, passing below the Blue Mountains to the north, the highway reaches Riley, where US 395 begins a concurrency that ends north of Burns. The 20 proceeds past Buchanan and across the arid hills through Juntura, after which it runs along the Malhuer River through its gorge. The highway enters the Treasure Valley at Vale, where it intersects with the historic Oregon Trail, and proceeds across farmlands to its intersection with OR 201, where this segment ends, the 201 heading north to Ontario.

US 20 resumes at its intersection with N Can-Ada Road in the farmlands north of Nampa, ID, where it runs concurrent with US 26. At Eagle the highway intersects with ID-55, and shortly thereafter runs through downtown Boise, Idaho's capital and largest city. The 20 runs concurrent with Interstate 84 from Boise to Mountain Home, where it also breaks from the 26. Out of the Snake River Plain, the highway runs along the edge of the Danskin Mountains and the Mount Bennett Hills, along the way passing historical markers for Castle Rock and Goodale's Cutoff (an alternate route of the Oregon Trail that is roughly followed here). The highway then enters the Camas Prairie, where it intersects with ID-75, and soon after passes through the town of Carey, where it meets with US 26 and US 93. The three highways all run concurrent along the southern edge of the Pioneer Mountains, a range of the Northern Rocky Mountains, and pass along the northern boundary of Craters of the Moon National Monument and Preserve, an old volcano field that offers a viewpoint. At Arco the 93 breaks off, and the 20 and 26 run through the Snake River Plain, past the Idaho National Laboratory (a government lab complex specializing in nuclear energy), where US 26 soon after breaks away. The 20 soon runs through Idaho Falls where, in the north of town, it currently ends.

The next state expected to feature US 20 is Wyoming, however, as a small part of the highway between Idaho and Wyoming runs through Montana, it is unknown if the Wyoming segment of the 20 will initially be continuous with the Idaho segment.

Cities[edit | edit source]

Oregon[edit | edit source]

Idaho[edit | edit source]

Junction List[edit | edit source]

Oregon[edit | edit source]

TBA

Idaho[edit | edit source]

TBA

History[edit | edit source]

Gallery[edit | edit source]

See Also[edit | edit source]

Flag Oregon Front.png Oregon
Cities Astoria - Bend - Burns - Coos Bay - Eugene - Klamath Falls - Lakeview - Medford - Newport - Ontario - Pendleton - Portland - Salem - The Dalles

Suburbs: North Bend - Rieth - Springfield - Terrebonne - Toledo - Troutdale - Warrenton

Scenery Towns: Adel - Albany - Baker City - Basque - Biggs Junction - Bly - Brothers - Buchanan - Burns Junction - Canyonville - Crescent - Garibaldi - Grants Pass - Hatfield - John Day - Jordan Valley - Juntura - Kerby - Maupin - McDermitt - Millican - Mount Vernon - Pacific City - Pleasant Hill - Riley - Rome - Shaniko - Vale

Highways Interstate 5 - Interstate 82 - Interstate 84 - Interstate 105 - Interstate 205 - Interstate 405
US 20 - US 26 - US 30 - US 95 - US 97 - US 101 - US 197 - US 199 - US 395
OR 22 - OR 39 - OR 58 - OR 62 - OR 78 - OR 99 - OR 126 - OR 140 - OR 201 - OR 213 - OR 569
Flag of Idaho small.png Idaho
Cities Boise - Coeur d'Alene - Grangeville - Idaho Falls - Ketchum - Lewiston - Nampa - Pocatello - Salmon - Sandpoint - Twin Falls

Suburbs: Eagle - Fernan Lake Village - Inkom - Meridian - Ponderay - Sun Valley

Scenery Towns: Arco - Bellevue - Bruneau - Butte City - Cambridge - Carey - Challis - Ellis - Fruitland - Galena - Hollister - Horseshoe Bend - Kamiah - Kooskia - Lower Stanley - Mackay - McCall - McCammon - Mountain Home - New Meadows - Payette - Shoshone - Stanley - Timmerman Junction - Tollgate - Torreys

Highways Interstate 15 - Interstate 84 - Interstate 86 - Interstate 90
US 2 - US 12 - US 20 - US 26 - US 30 - US 91 - US 93 - US 95
SH-13 - SH-21 - SH-28 - SH-51 - SH-55 - SH-74 - SH-75 - SH-78 - SH-128
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