The cache is only 265 metres from the suggested parking coordinates (vertically).
Enjoy a short, steep walk and be rewarded with views down the ridge to the city. Recommended at night time or daytime. Kangaroos and deer are likely to be spotted. Great views of the twinkling city lights at night, long valley views during the day.
Your best approach is to take the Pengana track and then the small foot track that takes you up on to the top of the ridge. DO NOT consider approaching this from the valley below.