I definitely knew I was fit enough to climb this mountain without trouble, but what happened with my lungs? Climbing the highest mountain in Borneo, 4095 meters above sea level? Climbing the highest mountain in Borneo, 4095 meters above sea level? The highest point on earth I have been was in Colorado, USA, driving across the 3700-meter Independence pass, in a car! In Java, Indonesia, I hiked up the 1900-meters high Merapi volcano, my highest climb ever. But this was different……