APM: 0 Location: SR 15 and Main St, San Diego Exit for Main St. Keep left for 15 to Harbor Dr. APM: 0 Location: SR 15 and Harbor Dr, San Diego SR 15 ends here at Harbor Drive, terminating a continuous numbered route that runs from here to Lethbridge, Alberta.  N to SR 94  N to SR … Continue reading California State Route 15, I-5 to Harbor Dr