This region and its escarpment served as the boundary between the Nganyaywana people of the
Northern Tablelands and the Danggati who had the hinterland valleys leading up to the tableland. The explorer
John Oxley passed by the
Apsley Falls in September 1818 and travelled eastwards through this area en route to Port Macquarie. Timber-getters and illegal settlers soon followed. The Wool Road (now the Oxley Highway), was built through here in 1842 with convict labour to link the wool-growing settlement of Walcha with Port Macquarie. Some of the park has been logged, although only small sections of the park have been cleared. Some areas have also been used for cattle grazing and for small-scale
manganese mining. In the 1970s Enfield and Riamukka State Forests were expanded over former Crown lands to include the steep areas of the Mummel River catchment. The
Bicentennial National Trail which was first used in the 1970s follows the Mummel Forest Road to the east of the park. Porters (Camp) air navigation facility and Country Energy towers are situated at in the northern portion of the park. In 1992 North-East Forest Alliance Forest (NEFA) protesters set up a camp in what is now Mummel Gulf National Park. NEFA protested against logging here and won an agreement to delay logging to allow a joint study by NEFA and the
New South Wales Forestry Commission. Mummel Gulf National Park was created in 1999, as part of the national regional forest agreement process. ==Pest animals and weeds==