Mount Colah is an outer suburb of Northern Sydney, in the welcome of New South Wales, Australia 29 kilometres north of the Sydney central issue district, in the local government area of Hornsby Shire. Mount Colah is often referred to as “Far Northern” or Upper North Shore.
Mount Colah is 5 km north of Hornsby, the nearest major town centre. It is one of the most northerly suburbs of Sydney and is where the “Welcome to Sydney” sign is located. Mount Colah is the second highest suburb in Sydney by elevation. Considered one of Sydney’s leafier suburbs, streets are clustered in the region of the Pacific Highway. Mount Colah is bordered to the east by the Ku-ring-gai Chase National Park.
Mount Colah varies in altitude from 68 m to practically 206-217m above sea level.