At the rock, or the Phone box by the harbour bridge
You can start at either end of the prom, but assuming you start at the end by the rock, you can start heading along the prom to the harbour, as you get to the end of the path, you can take the first opening by the phone box, and dip back into the path at the next opening making sure you cross the line of the 800m sticker on the floor.
run back to the rock (kick with right foot) to complete the mile and lap 1.
Repeat for as many miles as you run. but if you run a 5K you will need to either cross the bridge once, and high 5 the lamppost before the road, or run for a few hundred meters after the third kick of the rock to make up your .10