(The instant that I saw the map, I couldn't resist doing this. I've waited five seasons for something like this!)
Okay, having paused the episode on the map displayed during the final segment, the sharply-pointed part of the coastline, northwest of Star City, would correspond to that pointy bit of coastline southwest of Eureka, on your map of California. The concave area of the coastline, southeast of Star City, would be San Francisco Bay, and the jutty bit, farther south along the coast, would be between San Luis Obispo and Santa Barbara. So, that puts Star City at abooout... Fort Bragg, California! Congratulations, Fort Bragg; you're the home of the Green Arrow!