rinjani 4dMount Rinjani, at 3,726 meters (12,224 ft), is Indonesia's third-hhest mountain and the country's second-hhest volcano. The summit of Lombok is a dormant volcano, but Gunung Baru Jari,Mount Rinjani, at 3,726 meters (12,224 ft), is Indonesia's third-hhest mountain and the country's second-hhest volcano. The summit of Lombok is a dormant volcano, but Gunung Baru Jari,