Must tell you that the friend and I who visited the Grampians Mt Range yesterday both live on perfectly flat ground, and honestly, after driving 16klms uphill from the township of Halls Gap, to the McKenzies Falls, when we got out it was like were were drunk.
Didn't have our sea legs as they say. It is 16 klms of just 2 lanes, no overtaking, some pretty scary drops beside the road in places and evidence of the massive landslides caused by flooding. Ear popping stuff by the time you reach the top.
You pass this wonderful expanse of rock they call the Elephant's Hide. This is seen here going up and coming down.