Blue Mountains Rugby Club is based in the township of Lapstone within Greater Sydney, Australia.

[9] The club played friendly matches before being admitted to the Sub-Districts Rugby Union in 1968.

[10] Blue Mountains was promoted to the first division in 1983,[11] staying up for seven seasons before being relegated at the end of 1989.

[12] In 1991 the club went straight back to first division where they remained for two seasons until being relegated at the end of 1992.

[15] On September 2, 2023, the club reached the Kentwell Cup Grand Final, culminating in a maiden Premiership with a 44–40 victory over Hunters Hill Rugby Club at Concord Oval, NSW.