Lapstone is an Australian township on the eastern escarpment of the Blue Mountains in New South Wales at an elevation of 160 m (525 ft).

Lapstone is located 62 kilometres west of the Sydney CBD in the local government area of the City of Blue Mountains and is part of the federal electorate of Macquarie.

In September 1938, Lapstone hosted the second British Commonwealth Relations Conference, organised by the Royal Institute of International Affairs (Chatham House).

The viaduct was later widened to carry the old Great Western Highway when the deviation around the Lapstone Zig Zag was built.

The zig zag is now part of a walking trail on the old railway/highway alignment, including a memorial to John Whitton, the engineer in charge of the construction of the Blue Mountains line and many other early railways.

[7] The new tunnel was hailed as a major improvement, but problems with ventilation and water from the nearby creek led to trains getting stuck.

[8] The abandoned Lapstone Tunnel was used by the nearby RAAF base during World War II as storage for arms such as bombs and mustard gas.

One of the features of this project was the construction of a temporary railway line that crossed Darks Common south of Explorers Road.

[9] This was known as the Spur-line and was in operation from 1911 to 1913, the line and cutting now forming a part of a nature walk through Darks Common.

Smith built his own house, called "Logie", higher up the hill above the railway and Lucas's little cottage.

The grounds of some 6 hectares (15 acres) were planned with lawns, flowers, fruit and vegetable gardens, with water pumped from the Nepean River far below.

Downstairs suites are used for visiting VIPs and were created in 1994 by the architect Robert Staas and the interior designer Elizabeth Mackie, retaining the art deco theme[11] The New Lapstone Hotel was built in the 1950s further up the Great Western Highway at Blaxland, after the Lapstone Hill Hotel and grounds were purchased by the RAAF.

Arthur J., Hand, an alderman of the Blue Mountains Council bought the land to develop the suburb.

[1] Lapstone railway station is on the Blue Mountains Line of the NSW TrainLink interurban network.

All clubs form the Blue Mountains Netball Association and play matches at the complex on Saturdays.