Castle Tower National Park, Nature reserve in Gladstone Regional, Australia.

Castle Tower National Park lies 30 km south of Gladstone and 407 km northwest of Brisbane, split between the Iveragh and Foreshores localities. Open eucalypt woodland covers most of the park, with stands of hoop pine and monsoon forest in valleys and along watercourses. Mount Castle Tower is visible from Lake Awoonga, and Mount Stanley reaches 690.9 m.

Castle Tower National Park was gazetted on 4 June 2010 as a national park in the Gladstone Region, Queensland. It lies 407 km northwest of Brisbane and about 30 km south of Gladstone, split between the localities of Iveragh and Foreshores. The park is surrounded entirely by private land, so access has always depended on the goodwill of neighbours.

The park lies within the traditional country of the Bailai and Gurang peoples, whose connection to the Gladstone hinterland predates the 2010 gazetting of the reserve. The German source notes that the land is entirely surrounded by private holdings, so the only way in is on foot with the owners' permission or by boat across Lake Awoonga with the water board's approval.

Visiting this reserve requires advance permission from the Gladstone Area Water Board, as the entry route crosses their property. Be sure to arrange this approval well before planning your visit.

The park has no official trails and no visitor facilities, and it is entirely surrounded by private land. Walkers must get permission from the landowners to cross their property from the Bruce Highway or the Calliope–Monto road, or from the Gladstone Area Water Board to approach by boat across Lake Awoonga.