APM: 19 Location: SR 161 and SR 139, Siskiyou Cty Reassurance shield as SR 161 begins. 161 very closely follows the Oregon line over to US-97. In most cases, Oregon is directly on the right hand side of the road. At times, 161 enters Oregon completely, albeit barely and without signage. APM: 15 Location: SR 161 and … Continue reading California State Route 161, SR 139/OR-39/OR State Line to US-97