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The Hills Shire (from 1906–2008 as Baulkham Hills Shire) is a local government area in the Greater Western Sydney region of Sydney, New South Wales, Australia. The suburb is north-west of the Sydney central business district, and encompasses 401 square kilometres (155 sq mi) stretching from the M2 Hills Motorway in the south to Wiseman's Ferry on the Hawkesbury River in the north.

Muirfield High School is a public, co-educational, secondary day school located in North Rocks, a north-western suburb of Sydney, New South Wales, Australia.Established in 1976 and operated by the New South Wales Department of Education and Training, Muirfield is a non-selective school catering for approximately 738 students from Years 7 to 12.