APM: 19 Location: Market St and 10th St, Colusa Reassurance shield after the SR 20 split. APM: 20 Location: Market St and 13th St, Colusa A few blocks later, SR 45 turns right to finally head north out of town. APM: 24 Location: SR 45 and Maxwell Rd, Colusa Cty A few miles later follow Maxwell Rd to … Continue reading California State Route 45, SR 20 to SR 162