APM: 8 Location: SR 71 and Euclid Ave, Chino Hills Three miles to SR 91 after the SR 83 interchange. APM: RIV/2 Location: SR 71 and Riverside Fwy, Riverside Cty A couple miles later, we’ll enter Riverside County and approach SR 91. APM: 2 Location: SR 71 and Riverside Fwy, Riverside Cty Exit right for 91 west to … Continue reading California State Route 71, SR 83 to SR 91