Blair Athol is located about 15 km (9 mi) north of the Adelaide, South Australia CBD. Blair Athol borders the suburbs of Gepps Cross, Enfield, Prospect and Kilburn. Blair Athol's main and longest street is Florence Avenue. Blair Athol has two reserves, Blair Athol Recreational Reserve and Barton Street Reserve.
The Blair Athol Recreational Reserve is a large reserve covering a total area of approx. 46,800 sq. metres (180 x 260 metres). It features a football oval, cricket ground with batting cages, two netball/basketball courts and tennis courts which are exclusively used by members of the Kilburn tennis club. This reserve also features a large parking lot, 2 playgrounds with one to the north and the other to the south, a gazebo and the Kilburn Footy Club. Barton Street Reserve features a large grass field and a playground with several benches. This reserve covers a total area of approx. 18,400 Sq metres (230 x 80 metres).