Bali's highest volcano can be scaled in a night and a day - you'll want to depart around 2am to catch the sunrise. There are two ways to the top: one from Pura Pasar Agung on the southern face and the other from Pura Besakih, Bali's mother temple. The former starts higher and is thus a slightly shorter climb but the latter, which is more difficult gets you to the highest point of the crater rim not accessible from the other route. Ascents with a guide are best carried out starting at 10pm and under the light of the full moon with the objective of reaching the summit by sunrise. Anyone in good physical shape with no extensive climbing experience should be able to make the formidable climb that takes between 4.5-7 hours each way to complete, but you should be able to traverse a variety of steep and arduous terrain ranging from thick jungle brush to slippery mud to crumbling shale. Dangerous and grueling, but once you're at the top you won't give a damn. Guides can usually be found near Pura Besakih in the evenings - around full moon time is a good time to go.. Rp 300,000-600,000.