AMP: Sunnyside-Umpaine Hwy #332/7 Location: Sunnyside Rd and OR 339, Sunnyside, Umatilla Cty No reassurance shield after the 339 junction. AMP: 4 Location: Sunnyside-Umapine Hwy and Triangle Rd, Umatilla Cty A couple miles later, OR 332 bears right to head north and then bears left to head west – at the left curve, follow the highway to … Continue reading Oregon Route 332, OR 339 to WA State Line