Denistone is located 16 kilometres north-west of the Sydney central business district in the local government area of the City of Ryde.

In 1829 Blaxland transferred Brush Farm Estate to his eldest daughter, Elizabeth, and her husband Dr Thomas Forster.

Forster expanded the estate by purchasing the Porteous Mount grants of 48.6 hectares (120 acres) on the Denistone ridge in 1830.

Richard Rouse Terry acquired the land from the Blaxlands in 1872 where he rebuilt Denistone House, now within the grounds of Ryde Hospital.

Flora includes Sydney blue gum, red olive berry, orange bark, waddy wood and forest nightshade.

[1] Arthur Beetson, renowned as one of the greatest Australian Rugby league players of all time used to live in Denistone.