Based on article that I post before, there are view alternative route to the top of Rinjani Mountain. Here is the few possible variations route to the top of Rinjani Mountain. They’re outlined here:
1. Compress the last 2 days into one (racking up a hefty 10 to 11 hours on the trail). On the plus side it’s downhill all the way after the hard climb to the summit.
2. Retrace your steps to Senaru after climbing to the summit, making a 5-day circuit that includes another night at the hot springs.