This peak, at 2450m, is considerably higher than Sibayak, with even more stunning views from the top. Be warned, though, that the clouds love mingling with the summit and can often obscure the vista.
This mountain is much more bad tempered than Sibayak and you should take an experienced guide (350,000Rp), as hikers have gotten lost and died. The path up the mountain from Danau Kawar is fairly well-trodden by locals, but relying on a guide takes the guesswork out of timing your return to town or reading changing weather conditions. The climb takes seven to eight hours depending on your skill and the descent route.
To reach the trailhead, take an opelet to Danau Kawar (8000Rp, 1½ hours). There is a scenic camp site surrounding Danau Kawar for those travelling with gear.