APM: 12 Location: SR 20 and Neal St, Grass Valley Just after the 174 interchange SR 20 and SR 49 will split. APM: 12 Location: SR 20 and Neal St, Grass Valley Exit ahead for 20 west to Penn Valley. APM: 12 Location: SR 20 and Neal St, Grass Valley 20 west also heads to Marysville. APM: 12 Location: … Continue reading California State Route 49, SR 174 to SR 20