The Blue Mountains Sights (sic - read Sites) Reserve Mt Wilson Group was a Trust appointed by the Minister of the NSW Department of Lands in the early years of the 1900s. The exact date of its formation is not clear, but it certainly existed as far back as World War I.

The Trust was responsible for Sloan Reserve, Gregson Park and the War Memorial, but was seriously underfunded for many years.

In 1989, the NSW Government dissolved this Trust - and all similar ones - and the Mt Wilson reserves came under the control of the Blue Mountains City Council.