St Catherine (capital Spanish Town) is a parish in the south east of Jamaica. It is located in the county of Middlesex, and is one of the island's largest and most economically valued parishes because of its many resources. It includes the first capital of Jamaica, Spanish Town, originally  known as San Jago de la Vega or Santiago de la Vega (St. James of the Plain). St. Catherine was formed in 1867 It is located at 18°N 77°W. It is bordered by St Andrew in the east, Clarendon in the west, and by St Mary and St Ann in the north. It has an area of 1,192 km², making it one of Jamaica's largest parishes and it is one of the fastest growing parishes in the nation and has the largest economy out of all fourteen parishes. Except for the Hellshire Hills near the coast, the south of the parish is virtually flat. The central and northern sections are very mountainous, however; the northern border is on Mount Rosser, which crosses over into St Ann, the highest point being 686 metres (2,251 ft). A plain of approximately 230 square kilometres (57,000 acres) occupies the southern part of the Rio Cobre basin. The Rio Cobre is the only river that runs along the southern plain. It provides water to irrigate over 73 square kilometres (18,000 acres) on the plain.