U.S. Route 20 in Oregon

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U.S. Highway 20 marker

U.S. Highway 20
Route information
Maintained by ODOT
Length451.25 mi[1] (726.22 km)
Major junctions
West end US 101 in Newport
East end US 20 at the Idaho state line
CountiesLincoln, Benton, Linn, Jefferson, Deschutes, Lake, Harney, Malheur
Highway system
OR 19OR 22

U.S. Route 20 (US 20) is a major west–east cross-state highway in the northern part of the U.S. state of Oregon, especially east of the Cascade Mountains. It connects U.S. Route 101 in Newport on the central Oregon Coast to the Idaho state line east of Nyssa.

Route description[edit]

US 20 crossing the Cascade Range at Santiam Pass.

US 20 starts at an intersection with US 101 in Newport, and travels eastward over the Central Oregon Coast Range to Corvallis. In Corvallis, it intersects Oregon Route 99W (OR 99W) and briefly travels concurrent with OR 34 before proceeding northeast to Albany. From Albany, US 20 briefly travels concurrent with OR 99E before turning east through Lebanon and Sweet Home and entering the Cascade Mountains. It intersects OR 126 west of Santiam Pass and the two routes travel concurrent through Sisters. US 20 then continues eastward and southward to Bend, where it travels roughly parallel to US 97 for about 3 miles (4.8 km) before turning east through Brothers and Riley. At Riley, US 20 travels concurrent with US 395 through Hines and Burns to about 2 miles (3.2 km) northeast of Burns. From Burns, US 20 continues east through Juntura and Vale. In Vale, US 20 travels concurrent with US 26, and the two highways continue east to Cairo Junction, south of Ontario, and turn south, where they then also travel concurrently with OR 201 to Nyssa. Eastward from Nyssa, US 20/US 26 continue to the Idaho state line. The route throughout most of Oregon serves as an important link between Central and Southern Oregon and far Northern California to Boise, Idaho.

US 20 viewpoint of the Three Sisters mountains just east of the town of Sisters, Oregon

Special routes[edit]

US 20 has 2 business routes in Oregon: one in Toledo, and one in Bend.


Construction on a portion of US 20 between Newport and Corvallis, specifically, from just west of Chitwood to Eddyville, is being done to straighten and remove nearly 4.5 miles (7.2 km) from the route. Nearly all of the new highway was opened in October 2016, with just a small portion of new road at the west end, and further environmental remediation, to be completed in 2017.[2] The project made it easier for larger vehicles to travel, provided greater passing opportunities, and upgraded the highway to modern safety standards. Construction began in 2005, but was halted in 2007 because of excessive unexpected landslides. The project recommenced in May 2008 with a better plan for stabilizing these landslide locations. The final construction was expected to be completed in 2011, but continuing earth movement at four of the bridge sites delayed the project again. The Oregon Department of Transportation (ODOT) and the contractor were in a dispute over liability and money, a settlement was agreed upon, and the original design-build contract was rescinded. ODOT assumed control of the project and began completing the project in five phases, replacing the troublesome bridges with earth fill. Because of the previous delays, completion of the project was postponed until fall of 2016 for traffic on the road section, and late summer of 2017 for habitat improvement. The project is now estimated to cost $365.7 million.[3]

Oregon highway designations[edit]

The Oregon section of US 20 consists of the following highways numbered using ODOT's internal numbering system (see Oregon highways and routes), from west to east:

  • The Corvallis-Newport Highway No. 33;
  • Part of the Corvallis-Lebanon Highway No. 210;
  • The Albany-Corvallis Highway No. 31;
  • The Santiam Highway No. 16;
  • Part of the McKenzie Highway No. 15;
  • The McKenzie-Bend Highway No. 17;
  • The Central Oregon Highway No. 7.

Major intersections[edit]

Milepoints are as reported by ODOT and do not necessarily reflect current mileage. Z indicates overlapping mileage due to construction longer than established route, and – indicates negative mileage behind established beginning point.[5] Segments that are locally maintained may be omitted. For routes traversing multiple named state highways, each milepoint is preceded by the corresponding state highway number. 

LincolnNewport33 0.00 US 101 south – Waldport, Florence
US 101 north – Depoe Bay, Lincoln City
33 5.62
US 20 Bus. east – Toledo
33 5.74 OR 229 – Siletz, Toledo
33 7.49
US 20 Bus. west – Toledo
33 10.34Pioneer Mountain summit, elevation 377 feet (115 m)
33 23.18 OR 180 east (Eddyville–Blodgett Road) – Nashville, Summit
33 31.08Cline Hill summit, elevation 770 feet (230 m)
Benton33 38.28Dudley Hill summit, elevation 860 feet (260 m)
33 39.39 OR 180 west (Eddyville–Blodgett Highway) – Summit, Nashville
33 41.78Gellately Hill summit, elevation 789 feet (240 m)
33 44.57 OR 223 north – Wren, Kings Valley
33 49.73 OR 34 west – Alsea, WaldportWestern end of concurrency with OR 34
Corvallis33 55.67
91 (2)84.07
OR 34 east to I-5Interchange; eastern end of concurrency with OR 34; eastbound exit and westbound entrance
OR 99W south – Junction City, EugeneInterchange; western end of concurrency with OR 99W; westbound exit and eastbound entrance
91 (2)83.42
210 –0.05
OR 99W north (NW 3rd Street) – Monmouth, McMinnvilleEastern end of concurrency with OR 99W
210 0.00
31 0.10
To OR 34 east / I-5 – Lebanon
county line
Albany31 10.44Willamette River
Linn31 11.28
58 2.25
OR 99E south (Pacific Boulevard SW) – Junction CityWestern end of concurrency with OR 99E
58 (2)1.45
16 –0.03
OR 99E north to I-5 north – Salem, PortlandEastern end of concurrency with OR 99E; eastbound exit and westbound entrance
16 1.04–
16 1.08
I-5 – Eugene, Roseburg, Salem, PortlandExit 233 on I-5
16 6.55 OR 226 east – Crabtree, Scio, Lyons
Lebanon16 12.80 OR 34 west – Corvallis
Sweet Home16 27.07 OR 228 west (Holley Road) – Brownsville, Halsey
16 31.19Viewpoint (Foster Lake)
16 46.93Historical marker (Santiam Wagon Road)
16 63.64Tombstone Pass summit, elevation 4,236 feet (1,291 m)
16 71.52 OR 126 west (McKenzie Highway) – Springfield, EugeneWestern end of Route 126 concurrency
16 74.90 OR 22 west – Detroit, Salem
county line
16 80.77Santiam Pass summit, elevation 4,817 feet (1,468 m)
Jefferson16 84.57Viewpoint (Mount Washington)
Deschutes16 99.53Historical marker (Santiam Pass Road)
Sisters16 100.12
15 Z92.03
OR 242 west – McKenzie Pass
15 93.07
17 0.00
OR 126 east – Redmond, PrinevilleEastern end of concurrency with OR 126
17 9.09–
17 9.18
Bend17 18.51
US 97 / US 97 Bus. begins
Interchange; western end of concurrency with US 97 Bus.; eastbound entrance from US 97 south; westbound entrance from US 97 north
17 19.86 US 97 south – Mt. Bachelor, Klamath FallsInterchange; eastbound exit only
US 97 north – Redmond, PortlandInterchange; westbound exit only
17 20.99
7 0.51

US 97 Bus. south (NE 3rd Street) – Klamath Falls
Eastern end of concurrency with US 97 Bus.
7 19.95Historical marker (prehistoric river)
7 20.56Horse Ridge summit, elevation 4,291 feet (1,308 m)
7 35.65 OR 27 north – Prineville Reservoir
No major junctions
Harney7 103.03Historical marker (Bannock War)
7 104.69 US 395 south – Wagontire, Valley Falls, LakeviewWestern end of concurrency with US 395
Burns7 131.50 OR 78 east (East Monroe Street) – Crane, Winnemucca
7 134.29 US 395 north – John Day, PendletonEastern end of concurrency with US 395
7 144.25Historical marker (Fort Harney)
7 155.09Historical marker (Great Basin)
7 160.79Stinkingwater Pass, elevation 4,848 feet (1,478 m)
7 177.54Drinkwater Pass, elevation 4,212 feet (1,284 m)
Malheur7 232.99Vines Hill summit, elevation 2,886 feet (880 m)
7 238.78Graham Boulevard (OR 451) – Bully Creek Reservoir
Vale7 245.46Graham Boulevard (OR 451)
7 246.39 US 26 west (Glenn Street North) – Unity, John DayWestern end of concurrency with US 26
7 253.48Viewpoint (Trenkel Hill vista)
Cairo Junction7 258.20 OR 201 north to I-84 – OntarioWestern end of concurrency with OR 201
Nyssa7 265.97 OR 201 south – Adrian, Lake OwyheeEastern end of Route 201 concurrency
7 266.82 US 20 / US 26 east – Nampa, BoiseContinuation into Idaho across Snake River
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also[edit]


  1. ^ "US Route 20 in Oregon".
  2. ^ Lehman, Chris. "New Stretch Of Oregon Highway Opens A Decade After Ground Was Broken". www.opb.org. Retrieved 2017-01-30.
  3. ^ "The US 20 Project Background and History". Oregon Department of Transportation. Retrieved 11 May 2016.
  4. ^ a b Road Inventory and Classification Services Unit. "Straightline Charts". Transportation Development Division, Oregon Department of Transportation. Retrieved September 22, 2016.
  5. ^ Road Inventory and Classification Services (July 2017). "Straightline Chart Legend" (PDF). Oregon Department of Transportation. Retrieved April 7, 2018.

External links[edit]

U.S. Route 20
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