The parks comprise 35,492 hectares and include Cottan-Bimbang National Park (30,679 hectares), Cottan-Bimbang State Conservation Area (105 hectares), and The Cells State Conservation Area (4708 hectares). The parks also include several roads that are vested in the Minister under Part 11 of the National Parks and Wildlife Act to ensure continued access to neighbouring land. These roads do not form part of the reserved area of the parks but their management is subject to this plan and relevant legislation.
Cottan-Bimbang National Park was originally reserved as Doyles River National Park, being renamed by gazette notice in February 1999. ‘Cottan-Bimbang’ is possibly derived from the local Dunghutti word for the walking-stick palm (Linospadix monostachyos), which grows in the park’s warm temperate rainforests.