Left Turn to Zihuatanejo This is the northbound turnoff for downtown Zihuatanejo. Immediately after entering the turn is a stop sign preceded by a very large metal tope. You have been warned. The southbound entrance to Zihuatanejo does not have the tope. La Mira to Petatlan From the junction of Highway 37&200 at La Mira in Michoacan to Petatlan in Guerreo.