U.S. Route 30 in Oregon

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U.S. Highway 30
US 30 highlighted in red
Route information
Maintained by ODOT
Length	477.02 mi[1] (767.69 km) (using the entire Huntington Highway through Lime)
Tourist routes	Lewis and Clark Trail
Major junctions
West end	US 101 in Astoria
Major intersections	I-405 in Portland I-5 in Portland I-205 in Portland I-84 from Hood River to Ontario US 197 in The Dalles US 97 in Biggs Junction I-82 near Hermiston US 395 in Pendleton
East end	US 30 at the Idaho state line
Location
Country	United States
State	Oregon
Counties	Clatsop, Columbia, Multnomah, Hood River, Wasco, Sherman, Gilliam, Morrow, Umatilla, Union, Baker, Malheur
Highway system
United States Numbered Highway System List Special Divided Oregon Highways Interstate US State Named Scenic
← OR 27 → OR 31

U.S. Route 30 (US 30) in the U.S. state of Oregon is a major east–west United States Numbered Highway that runs from its western terminus in Astoria to the Idaho border east of Ontario. West of Portland, US 30 generally follows the southern shore of the Columbia River; east of Portland, the highway has largely been replaced with Interstate 84 (I-84), though it is signed all the way across the state, and diverges from the I-84 mainline in several towns as a de facto business route. (The state of Oregon does not sign Interstate business routes; instead, it uses the designations US 30 and Oregon Route 99 [OR 99; along the I-5 corridor] for this purpose.) Out of all the states US 30 traverses, it spends the most time in Oregon.^{[citation needed]} At 477.02 miles (767.69 km), it is also the longest road in the state.