AMP: Adrian-Caldwell Hwy #454/0 Location: OR 454 and OR 452, Malheur Cty Just after Oregon 453, we’ll approach Oregon 452. Turn left to follow 452 over the bridge to Adrian and mainland Oregon. Stay straight to follow 452 to the state line and old Idaho SH-18.  S to OR 453  W to OR 201, E to … Continue reading Oregon Route 454, OR 453 to OR 452