Are there monkeys on Mt. Rinjani?

Yeah, long-tailed macaques are common on the lower trails, particularly in the forested sections near Senaru and Sembalun. They’ve learned over years of human presence that trekkers often carry food and may leave it accessible.

These monkeys are intelligent, opportunistic, and completely unafraid of people. That makes them fun to watch but occasionally frustrating if they raid an unattended snack bag or unzip a compartment that isn’t fully closed. They’re not aggressive in the sense of attacking humans, but they’ll snatch food from open hands or unzipped packs with startling speed if given the chance. Sometimes they even work in small groups where one creates a distraction while another goes for the food.

Our guides at Lombok-Indonesia.org brief trekkers on monkey behavior and make sure all group food gets stored in sealed containers that porters carry. If you encounter monkeys on the trail, keep walking at a normal pace, keep food out of sight, and avoid direct eye contact, which monkeys can interpret as a challenge. Feeding them is strongly discouraged because it encourages dependency and aggression.

A brief monkey sighting is usually a highlight of the first day’s hike, a moment of wild Indonesia that feels adventurous without being threatening.