Coming from an elevation of 3,000 feet in the Blue Mountains, the Rio Grande River and its main tributaries the Back and Stony Rivers have carved a gorge between that range and the John Crow Mountains. Mainly banana fields crowd its banks. Rafting on the Rio Grande from Berrydale to Rafters’ Rest at St. Margaret’s Bay is one of the favorite things to do in Portland, Jamaica for locals and tourists alike. Errol Flynn supposedly initiated rafting on the Rio Grande during the 1940’s.The scenic 6-mile trip takes two and a half hours. Rafting first developed as a means of transportation on the river as the rapids prevented the use of boats. Raftsmen spend many years as apprentices.