Welcome to Gunung Tambora
But you’re here to surmount the peak. From the summit you’ll have spectacular views of the 6km-wide caldera, which contains a two-coloured lake, and endless ocean vistas that stretch as far as Gunung Rinjani (Lombok). A basic climb to the crater rim takes at least two days; if you want to venture down into the spectacular crater – one of the world's deepest – add another five days. Much of the mountain was declared a national park in 2015.
The base for ascents is the remote village of Pancasila near the town of Calabai on the western slope. Here you can organise climbs. Contacts include Pak Saiful and the Rik Stoetman. Both can rent rooms (from 100,000Rp to 200,000Rp), and handle transport and logistical issues. Guides and porters cost about 200,000Rp to 300,000Rp per day.