Driving further, around to Opossum Bay, if you go to the end of the road, you come to a turning circle at the gates of the Arm-End Reserve. There are tracks all over this, as you can see on Google Maps. I walked out to White Rock Point, where there's a navigation light and a radio antenna. There would normally be a good view of the mountain from here, but it was a bit cloudy on Saturday. It was lovely in the sun for a while, but then it started raining. Must go back sometime. Would be a good place to take pushbikes I think.