The Grampians National Park (also Gariwerd), commonly referred to as The Grampians, is a national park located in the Grampians region of Victoria, Australia. The 167,219-hectare (413,210-acre) national park is situated between Stawell and Horsham on the Western Highway and Dunkeld on the Glenelg Highway, 260 kilometres west of Melbourne and 460 kilometres east of Adelaide.
Proclaimed as a national park on 1 July 1984, the park was listed on the Australian National Heritage List on 15 December 2006 for its outstanding natural beauty and being one of the richest indigenous rock art sites in south-eastern Australia. The Grampians feature a striking series of sandstone mountain ranges.
Although a bit far for a day trip, some acquaintances of ours have done it all in a day, although I must say it was a bit of a Cook's tour! Best to take your time and enjoy your trip there and back, as well as stay a few days and do all the wonderful hikes and walks.