APM: 10 Location: SR 124 and SR 16, Amador Cty Reassurance shield as SR 124 begins. APM: 2 Location: Plymouth Hwy and Preston Ave, Ione Several miles later, we’ll enter Ione and approach SR 104. APM: 2 Location: Plymouth Hwy and Preston Ave, Ione Turn right for 104 west to Galt. 104 east and 124 west run concurrent … Continue reading California State Route 124, SR 16 to SR 104