The Adelaide Hills region is located in the southern Mount Lofty Ranges east of the city of Adelaide in the state of South Australia. The largest town in the area, Mount Barker, has a population of around 29,000 and is one of Australia's fastest growing towns.
The Adelaide Hills region is one of the cooler wine regions of mainland Australia as, despite warm days in January and February when the grapes are ripening, the region generally experiences cool nights. This significant diurnal variation results in cool mean daily temperatures even in summer and the consequence of this is high quality, cool-climate wines, leading to its world-famous reputation as a wine-producing region. The numerous wineries and cellar doors are represented by a regional association and geographical indication called the Adelaide Hills wine region.