List of highway route numbers in Oregon Mainline routes Mainline routes

| Number_ | South_west_end | North_east_end | Formed | Eliminated_ |
|---|---|---|---|---|
| Oregon Route 380 | US 26 in Prineville | East of Paulina | 2002 |  |
| Oregon Route 402 | OR 19 at Kimberly | US 395 in Long Creek | 2002 |  |
| Oregon Route 410 | Sumpter | OR 7 southeast of Sumpter | 2003 |  |
| Oregon Route 413 | OR 86S/OR 414 in Halfway | Cornucopia | 2003 |  |
| Oregon Route 414 | OR 86S/OR 413 in Halfway | OR 86 east of Halfway | 2003 |  |
| Oregon Route 422 | South of Klamath Agency | US 97 southwest of Chiloquin | 2002 |  |
| Oregon Route 422S | OR 422 in Chiloquin | Chiloquin | 2002 |  |
| Oregon Route 429 | Near Crescent Lake | OR 58 at Crescent Lake Junction | 2002 |  |
| Oregon Route 451 | US 20 southwest of Vale | US 20 in Vale | 2003 |  |