Jomolhari Trek is one of the shortest and the most popular trek in Bhutan. With altitude differences of 2,500m to 5,000m (lowest and highest point of the route) it offers a wide range of landscape and fauna and flora. The highlight of this trek is the spectacular view of Mount Jomolhari( as seen from in this picture from Drukgyel Dzong). With elevation of 7,300 m, it is the source of Paro river. The trek starts from Drukgyel Dzong, now in ruins (picture inserted).The Dzong was built in 1649 and was destroyed completely by fire in1950s. The total duration of this trek is 8 days. The best seasons for this trek are from April to June and from September to November.