APM: 87 Location: SR 36 and SR 89, Tehama Cty Just after the SR 172 junction, SR 89 will split to head up to Lassen Nat’l Park. APM: 87 Location: SR 36 and SR 89, Tehama Cty But not before we cross Morgan Summit. APM: 87 Location: SR 36 and SR 89, Tehama Cty Stay straight for 36 … Continue reading California State Route 89, SR 172 to SR 36