 A range called the Sierra de Chamá, which, however, changes its name frequently from place to place, strikes eastward towards Belize, and is connected by low hills with the Cockscomb Mountains; another similar range, the Sierra de Santa Cruz, continues east to Cape Cocoli between the Polochic and the Sarstoon; and a third, the Sierra de las Minas or, in its eastern portion, Sierra del Mico, stretches between the Polochic and the Motagua rivers.Between Honduras and Guatemala, the frontier is formed by the Sierra de Merendón.In addition to the streams which break through to the Pacific, a number of larger streams which drain to the Gulf of Mexico or the Caribbean Sea have their sources in the highlands.