Blair Athol is located about 6 km (4 mi) north of the Adelaide CBD, South Australia. Blair Athol borders the suburbs of Gepps Cross, Enfield, Prospect and Kilburn. The suburb is rectangular, stretching from Grand Junction Road in the north to Angwin Avenue in the south between Prospect Road on the west and Main North Road on the east. Blair Athol's main and longest street is Florence Avenue.

Gepps Cross is a suburb and major road intersection in the north of Adelaide, South Australia. Gepps Cross is traditionally seen as the end of the inner suburbs and the start of the outer northern suburbs, as it was home to a major abattoir with holding yards and other open space. It is the first significant open space encountered after the North Parklands. It retains the open nature, even with warehouses, a velodrome, hockey stadium, Adelaide Raiders – a Croatian soccer club, and karate training facilities.