Sembalun Trekking Route is one of the popular Rinjani National Park Route. Starting in the morning from the Rinjani Trek Centre in the village, the climb to Plawangan II at 2,638 m will take about 8 hr via POSI (1,300 m), POSII (1,500 m), and POSIII (1,800 m). Starting altitude is1100 m, so there are no humid conditions to deal with. The first half or more of the trek is literally a breeze. The trek through savannah grassland is windy and easygoing, with gentle ups and downs, and the only obstacle to look out for is the “cow pats” deposited by the villagers’ cows along the way. Rolling hills and amazing scenery help to ease the tiredness, unlike the enclosed tropical rain forest of the Senaru route. From POS 2 to POS 3, the climb is still manageable. The challenge for the Sembalun route is from POS 3 to POS Extra, as the uphill gradient can be 50 degrees at times. Young children will find this section challenging as some steps are set quite far apart. Cooler weather up here may give the impression that the body does not need fluids, but does drink more to prevent altitude sickness from setting in. Strangely, there is a guy selling cold drinks (Pocari sweat, Coke, etc) here at the campsite at exorbitant prices (40000 Rp per drink) for those who crave it. Overnight at the campsite here and go for the summit starting at 3 AM the next day. You need to be well-rested as this is a stiff task – the final climb is nearly 1,100 m on difficult ground.