rinjani4dTrek Overview. Rinjani Summit 4D3N to Senaru Rim is one of Rinjani National Park Trekking Package Service start from Sembalun to the crater rim Sembalun and overnht in tent, climb Rinjani summit, down to Lake, hot springLording it over the northern half of Lombok, Gunung Rinjani (3726m) is Indonesia's second-tallest volcano. It's an astonishing peak, and sacred to Hindus and Sasaks who make pilgrimages to