AMP: 7 Location: SR 203 and US 395, Mono Cty Reassurance shield as California 203 begins. AMP: 7 Location: SR 203 and Meridian Blvd, Mammoth Lakes Less than a mile after 203 begins, we’ll enter the town of Mammoth Lakes. AMP: 6 Location: SR 203 and Meridian Blvd, Mammoth Lakes Reassurance shield after Meridian Blvd. … Continue reading California State Route 203, US-395 to Minaret Summit