Oregon Route 58

Oregon Route 58 (OR 58), also known as the Willamette Highway No. 18 (see Oregon highways and routes), is a state highway in the U.S. state of Oregon. The route, signed east–west, runs in a southeast-northwest direction, connecting U.S. Route 97 north of Chemult with Interstate 5 south of Eugene. It links the Willamette Valley and Central Oregon, crossing the Cascade Range at Willamette Pass. OR 58 is generally a modern two-lane highway with a speed limit of 55 mph (88 km/h), built through the Willamette National Forest in the 1930s.

OR 58 is a designated freight route, forming one of several connections between I-5 and US 97, which leads back to I-5 at Weed, California. This is a popular alternate route for trucks on the I-5 corridor, avoiding the steep grades and winter closures of I-5 over Siskiyou Summit. The highway is also on the National Highway System, and is classified as an expressway southeast of Odell Lake. (US 97 is also classified as such south to the state line, and in California it is part of the Freeway and Expressway System.) This matches the general routes of the 1887 Oregon and California Railroad over Siskiyou Summit and the 1926 Natron Cutoff along OR 58 and US 97; the latter is now part of the Union Pacific Railroad's I-5 Corridor rail line, while the former is the Central Oregon and Pacific Railroad shortline.