The area was inhabited and was a noted hunting site for thousands of years by
Indigenous Australians prior to the arrival of Europeans. The tribal name for the park is
Nyanyi-Yandjip named after the reeds and lake which were thought to resemble the hairy mane of the
dreamtime creature the
Waugul. The word Yanchep is derived from
Yandjip or
Yanget which is the aboriginal name for the local
bulrush reed found fringing the lakes in the area. The first
European visitor arrived in 1834 when John Butler, a farmer, came in search of his lost cattle and noted the presence of the lakes,
wetlands and plentiful game. While in the area Butler was greeted by the men of the
Yellagonga peoples who inhabited the area. Lieutenant
George Grey travelled through the area in 1838 and made note of the remarkable caves he found in the area. Surveyor
John Septimus Roe and
Governor John Hutt visited the caves in the park in 1841. A road survey was conducted near Loch McNess in 1862 and later in 1865 a stock route was built through the area that was later used by
drovers. The first settler to arrive in the area was Henry White who arrived in 1901 and built his house near the north west shore of
Yonderup Lake, he was later appointed as a caretaker and guide in 1903. ==Flora and fauna==