westernmost segment of the central highlands of New Guinea. It is located in the Indonesian part of New Guinea, known as Irian Jaya. The range extends for 430 miles (692 km), and much of it lies above 12,000 feet (3,660 m), with a number of peaks rising above the 14,500-foot (4,400-metre) snow line. It is composed of the Sudirman (west) and Jayawijaya (east) ranges, the former containing the island's highest point, 16,500-foot (5,000-metre) Puncak Jaya (Jaya Peak), formerly Puntjak Sukarno, and Mount Carstensz. These rugged mountains have their tree line at about 12,000 feet.