With more than 40,000 bikes sold each year in South Australia, it's little wonder that mountain biking has become such a popular sport, particularly when combined with the beauty of the rolling Adelaide Hills. dotted throughout the Adelaide Hills. Dotted throughout the hills are a series of world class mountain biking trails. The Eagle Mountain Bike Park features 22 kilometres of tracks to suit novices and experts, with the Kidman Trail a 250 kilometre challenge for the biking enthusiast. If you're after some rewards in addition to the spectacular scenery, then the Hills Short Wine and Food Trail is for you, taking you between 12 food and wine producers in the Adelaide Hills.