2D1N hike from Sembalun. I didn’t record any data, just went with the flow of our guide. Distances vary but it’s around 15 miles RT if starting and returning from/to Sembalun. Hike is hot and humid with numerous scheduled stops including one for lunch. Summit day starts early followed by a return to the base of the mountain. Overnight in a tent on the crater rim. Beautiful mountain although the amount of trash will shock many.