Allan Cunningham set out to explore the area to the west of Moreton Bay in 1827, crossing to the west of the Great Dividing Range from the Hunter Region and travelling north. In June 1827, Cunningham climbed to the top of Mount Dumaresque (near what is now Clintonvale close to Maryvale) and after wrote in his diary that this lush area was ideal for settlement. Exploring around Mount Dumaresque, Cunningham found a pass, now known as Cunninghams Gap. Cunningham returned to Moreton Bay in 1828 and with Charles Fraser charted the route through the pass to the Darling Downs. Ludwig Leichhardt in 1844 saw the remains of a camp showing the signs of white men through ridge poles and steel axes.