Mount Batur is an active stratovolcano rising from the floor of the Batur caldera, reaching 1,717 metres at its highest point. The standard climb departs at around 3am to reach the summit for sunrise, which — from the right position — shows the shadow of the volcano projected across the caldera lake as the sun comes up behind Lombok's Rinjani. The hike takes roughly two hours at a moderate pace, following a well-worn path up volcanic scree and lava fields.
From Songan, the trailhead is accessible on foot or by motorbike across the caldera floor. Guides meet hikers at the base and are required by the local guide association; fees are around 300,000–400,000 IDR per person. At the summit there are several craters, fumaroles, and a small shelter selling instant noodles cooked in the volcanic steam — a gimmick, but one that works. The descent takes about 90 minutes and is easier than the ascent.