[1] Primarily categorised as a sports field, the reserve contains an open grassland, bushland and recreational areas within the vicinity of native plants, such as eucalyptus trees.

[3] Brenan Park was planned to be a housing subdivision and a market area in 1938, with its triangular shape fashioned to take advantage of the topography and views of the surrounding district.

[4] The reserve is located in the suburb of Smithfield, and is bordered by Cumberland Highway, Brenan and Bourke Streets, which all give good passive surveillance opportunities from close residences and contiguous roads.

[7] The boundary along the top part of Bourke Street and near Cumberland Highway is thickly planted with an avenue of trees and shrubs, which provide a sense of entry to the park.

[8] The corner of Brenan Street and Cumberland Highway provides good viewing site for birdwatching as dozens of bird species flock to the area to feed.