Blue Mountains. 1. A range which runs through Jamaica from E. to W., and divides the island in two, artaining in parts an elevation of 7,000 ft. On the N. side the ascent is gradual through an undulating and healthy country, but the S. aspect is wild, rugged, and precipitous.
2. A range in New South Wales. Australia (lat. 30° to 34° S., long. 150° to 151° E.). It has an elevation here and there of 3,400 ft,, and consists to a large extent of sheer cliffs enclosing vast valleys, both the upper and the lower lands being thickly wooded. Several rivers have their sources here, and either join the Macquarie or fall into the sea at Broken Bay.