Most of the info below is taken from the new large glossy brochure (of 130 pages) put out by Tourism Victoria, s'appelle 'The Wine Regions of Victoria.
The book is first broken up into 6 major geographical regions, all containing wineries:
1. Around Melbourne
2. Western Victoria
3. North West Vic.
4. Central Vic.
5. North East Vic.
6. South East Vic
It is then broken down further into 22 actual wine regions
To keep things simple, I'll only cover the main ones on this map, the ones around Melbourne and to the west and South west, within a limit of around a 3-4 hour drive from Melbourne.
On the map, No 1 is the famous Yarra Valley (the only other region which is almost as famous in reputation is the group in the far north west corner of Vic. at Mildura, which is by far Victoria's largest grapes growing region)
No 2 the Mornington Peninsula (assez celebre).
No 3 is Geelong (also minor)
No 4 Sunbury (assez petit)
No 5: Macedon (fairly major)
No 6 Ballarat (quite major, and still increasing)
No 7 Pyrenees: (major winery region)
No 8: The Grampians National Park region (major)
No 9: Hamilton (the one just below the Grampians - petit, minor)
No 12: Bendigo (becoming more major)
No 13: Heathcote (petit)
And now for the Great Grape Road touring route map.
It's not so clear, but there are about 36 wineries on the trail, which starts at Ballarat (far bottom right corner of the map) and takes in many of the Ballarat region wineries (all marked by the red triangles, followed by some of the Pyrenees, then Grampians ones, before returning to Ballarat.
Kate