Used the mostly unused trail from Tahura camp. There is a sign which says Puncak Gunung Lawu 3.8 km. That is a mistake! The real distance is 9 km until the peak. Following the signs POS I-V through the jungle. Half way betwen POS IV and V the path joins the main path from Cemoro Kandang. The portion between POS II and IV is very steep. The whole trail is unbeaten, through the jungle, but machete was not necessary during the night, with headlight, one could see the path judging from the underbush size. nevertheless, it is easy to get lost, you can use my GPS track here: http://www.movescount.com/moves/move58823002

Fun fact: on the way down, around 2000 m altitude, I saw a Javan leopard hunting a monkey. Thankfully only the monkey and not me.