[1] The reserve is formed by the slopes of a sandstone ridge, between Kepa Road and the Pourewa Creek.

[2] The Pourewa Creek at the south of the reserve flows westwards towards the Ōrākei Basin.

[2] The flora in Kepa Bush is diverse and the most common plants and trees include Totara, Rimu, Kanuka, and Manuka.

[2] Besides that, Kepa Bush was used by Maori pre-colonisation as a place to find food and make weapons.

[5] The land was purchased by Bishop Selwyn in 1844, as a part of the grounds of the St John's College.