São Nicolau is pure nature. Steep mountain slopes with fantastic rock formation, deserted villages and fertile valleys are waiting for you to discover them on this island of 346 square kilometres. People say that there is a very special mood on this island. It’s ideal for hikers and mountain bikers because its mountains are not quite as high as those on Santo Antão. The highest mountain is the 1312-metre high Monte Gordo in the most fertile part of the island, the northwest. A mountain range of up to 700 metres in elevation, levelling out in a plateau, stretches across the more arid and very sparsely populated east of São Nicolau. The south of the island is also very dry. The coastal areas are generally quite difficult to access, which makes the mountainous island less suitable for those who just want a holiday at the beach.
Information from (http://www.capeverde.com/islands/sao-nicolau.html