AMP: North Umpqua Hwy E #138/100 Location: OR 138 and US-97, Klamath Cty Reassurance shield as Oregon 138 begins. AMP: 87 Location: OR 138 and Upper Crater Lake Rd, Douglas Cty Thirteen miles later, as we approach the northern Crater Lake turnoff, turn left to head to Crater Lake. OR 230 is coming up soon and heads … Continue reading Oregon Route 138, US-97 to OR 230