This is a picture of Ke'e Beach. There is no road that goes all the way around the island. The road goes about 2/3rds of the way around and in both spots there is a dead end that you just turn around and go back. Heading north from the Pono Kai, that turnaround will be at Ke'e beach. This is a very popular beach and the parking fills up fast so you'll want to get there early.
Jeff & Kim Silvers