List of highway route numbers in Oregon Mainline routes Mainline routes

| Number_ | South_west_end | North_east_end | Formed | Eliminated_ |
|---|---|---|---|---|
| Oregon Route 66 | OR 99 in Ashland | US 97 south of Klamath Falls | 1932 |  |
| Oregon Route 69 | OR 126 in Eugene | I-5 in Springfield | 2002 | 2007 |
| Oregon Route 70 | OR 140 at Dairy | Bonanza | 1932 |  |
| Oregon Route 74 | I-84/US 30 east of Arlington | US 395 at Nye | 1932 |  |
| Oregon Route 78 | US 20/US 395 in Burns | US 95 at Burns Junction | 1932 |  |
| Oregon Route 82 | US 30 in La Grande | Joseph | 1932 |  |
| Oregon Route 86 | I-84 near Baker | Near Hells Canyon, ID | 1932 |  |
| Oregon Route 86S | OR 86 northeast of Richland | OR 413/OR 414 in Halfway | 2003 |  |
| Oregon Route 90 | OR 201 north of Ontario | SH-52 in Payette, ID | 1932 | 1950s |