Oregon Route 51

OR 51 starts, at its southern terminus, in the city of Monmouth, at an intersection with Oregon Route 99W and Oregon Route 194. It heads due east from there for approximately 2+1⁄2 miles, reaching the neighboring city of Independence. In Independence, it turns north, running parallel to the Willamette River, and continues for 6 miles (9.7 km). OR 51 terminates at an intersection with OR 22 near Brunks Corner.

While no significant improvements are planned to OR 51 itself; a proposed project to improve OR 22 includes conversion of the (notoriously dangerous) intersection between OR 51 and OR 22 into a grade-separated interchange.[3]

Milepoints are as reported by ODOT and do not necessarily reflect current mileage. Z indicates overlapping mileage due to construction longer than established route, and – indicates negative mileage behind established beginning point.[4] Segments that are locally maintained may be omitted. For routes traversing multiple named state highways, each milepoint is preceded by the corresponding state highway number. The entire route is in Polk County. [1]

Location[1]	Milepoint[1]	Destinations	Notes
Monmouth	43 0.00	OR 194 – Monmouth City Center, Kings Valley	Continuation beyond southern terminus
		OR 99W – Corvallis, McMinnville
Independence	43 2.35 193 6.34	South Main Street – Buena Vista, Albany
​	193 0.00	OR 22 – Salem, Dallas
1.000 mi = 1.609 km; 1.000 km = 0.621 mi