Oregon Route 99 is a state highway that runs between the southern border of Oregon, and the city of Junction City. Oregon Route 99 was formed from parts of the former U.S. Route 99; it shares much of its route with I-5, but much of it is also independent. Between Portland and Junction City, the highway is forked into two routes: Oregon Route 99E and Oregon Route 99W.

Quick Facts Route information, Length ...

Oregon Route 99
Route 99 highlighted in red
Route information
Maintained by ODOT
Length	211 mi (340 km)
Existed	1972–present
Major junctions
South end	I-5 in Ashland
Major intersections	OR 66 in Ashland OR 62 / OR 238 in Medford US 199 in Grants Pass OR 42 near Winston OR 138 in Roseburg OR 38 in Drain I-105 / OR 126 in Eugene OR 36 near Junction City
North end	OR 99E / OR 99W in Junction City
Location
Country	United States
State	Oregon
Highway system
Oregon Highways Interstate US State Named Scenic
← US 99 → OR 99E

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Oregon Route 99 technically starts at an interchange with Interstate 5 at exit 11, south of Ashland. There it departs from the freeway, running parallel to I-5 as it passes through the cities of Ashland (as Main Street), Talent, Phoenix, and Medford. The highway rejoins I-5 at exit 35, just northwest of Central Point.

OR 99 departs from I-5 several more times through the mountains of southern Oregon, only to rejoin again a short distance later. Junctions are found in Gold Hill (2nd Ave), Grants Pass, between Myrtle Creek and Sutherlin (crossing I-5 in Roseburg), through Drain and Yoncalla, and Cottage Grove and Goshen. These departures serve as business routes for I-5, as Oregon does not have or sign Interstate business routes.

When it reaches Eugene, OR 99 departs from I-5 for a final time. It heads west into downtown, along Franklin Boulevard past the University of Oregon. Downtown, OR 99 is on the 6th and 7th Avenue couplet. (Much of the section in Eugene is co-signed with either Oregon Route 126 or OR 126 Business.) West of downtown it heads north on an expressway alignment, which continues to Junction City. In Junction City, OR 99 ends, as it splits into eastern and western forks.