I looked up Blue Mountain Coffee and found this.
The Coffee Industry Regulation Act
The Coffee Industry Regulation Act specifies what coffee may use the Blue Mountain label. Additionally, it restricts the use of the Blue Mountain trademark to those authorized by the Coffee Industry Board. Broadly speaking, coffee harvested from the parishes of Saint Andrew, Saint Thomas, Portland and Saint Mary may be considered Blue Mountain coffee.[2]
Traditionally, only coffee grown at elevations between 910 metres (3,000 ft) and 1,700 metres (5,500 ft) could be called Jamaica Blue Mountain. Coffee grown at elevations between 460 metres (1,500 ft) and 910 metres (3,000 ft) is called Jamaica High Mountain, and coffee grown below 460 metres (1,500 ft) elevation is called Jamaica Supreme or Jamaica Low Mountain. (All land in Jamaica above 1,700 metres (5,500 ft) is a forest preserve, so no coffee is grown there.)
Thunder goes to the mountains and gets his beans from farmers high up in them. He then roasts them back home.