点评：A superb hike/climb early in the season when there is still substantial snow. Ice axes and crampons are needed then and basic mountaineering skills. In late summer when the mountain turns into a huge gravel pile the trail can be unpleasant, as you will be scrambling up long steep stretches of rounded blobs of lava, from gravel size to huge boulders. Twisted ankles, falls, etc. are frequent. People often underestimate it, going in shorts and T-shirts and running shoes. It is still a sizeable undertaking, regardless of your age and fitness level, and bad weather can turn it serious in a hurry.