Puu Oo Volcano Trail has only one trailhead, so in and out is the way to backcountry trek it normally. This wilderness trail has a total elevation difference of 108 feet which is lower than average. This backcountry trek shouldn't take more than 4.5 hours, but you never know stuff could go wrong and you could get stuck so be prepared for that. This great outdoors trail is not that long but it's always great to bring some emergency supplies, you never know what could happen. With its 5 miles of walking distance it's an average length wilderness hiking trail. This great outdoors trail sometimes gets very dry, so make sure you check current conditions and fire restrictions with local forest authorities before you head out. There's not much difference in elevation along Puu Oo Volcano Trail which means the conditions are about the same from start to finish.