In the 1910s Gustav and Kate Weindorfer began campaigning for the area from Cradle Mountain to Lake St Clair, including Mount Ossa, to be a national park. It was declared a scenic reserve in 1922, a wildlife reserve in 1927 and its current designation of national park from 1947. During this transition former trappers began building huts and guiding bushwalkers, including Paddy Hartnett, Weindorfer and Bob Quaile.