Trott Park, South Australia in the context of Southern Expressway (Australia)

O'Halloran Hill is a suburb in the south of Adelaide, South Australia, situated on the hills south of the O'Halloran Hill Escarpment, which rises from the Adelaide Plains and located 18 km from the city centre via the Main South Road. The suburb is split between the Cities of Marion and Onkaparinga, and it neighbours Happy Valley, Hallett Cove, Trott Park and Darlington. It includes a large area of former farmland and commercial vineyards known as the Glenthorne Estate, which in 2018 became the Glenthorne National Park–Ityamaiitpinna Yarta.

Hallett Cove is a coastal suburb of Adelaide, South Australia located in the City of Marion 21 kilometres (13 miles) south of the Adelaide city centre. It has a population of more than 12,000 people. Adjoining suburbs are Marino to the north, Trott Park and Sheidow Park to the east and Lonsdale to the south.

The name Kareildung has been mistakenly ascribed to Hallett Cove as an Indigenous name. The Kaurna name of Murrkangga was derived from the meaning of Kareildung and applied specifically to the Amphitheatre in the Hallett Cove Conservation Park.