An adventurous trekker's delight, the green carpeted Naga Hills that surge to 2,000 feet from the Brahmaputra valley rise further to form Mount Saramati, at an elevation of 12,602 ft, the state's highest peak. This is also where the Naga Hills merge with the Patkai range, which borders Myanmar. The mountain range Pat-kai-chang-kan or 'oath taken by sacrificing a fowl,' was known in ancient times as Daikaorang or nine mountains. A haven for flora and fauna of the evergreen tropical and sub-tropical variety, Nagaland's wooded forests are intriguing for the avid trekker. The hills provide routes for amateurs and professional trekkers; advance preparations regarding permissions, weather, safety, and shelter are required. Here are six trekking routes that will have you mesmerised and returning for more.