Trail climbing is the easiest. Climbers just walk along trails to the top of a mountain. The trails are not very steep, and the mountains are small. The second type, rock climbing, takes place on steeper slopes and bigger mountains. Climbers generally have to use special equipment such as climbing shoes, ropes, and metal nails called pitons. The third type is ice climbing. Ice climbing takes place only on very high mountains and requires a lot of special equipment. Equipment use in ice climbing includes ice axes and crampons, which are sqikes attached to a climer’s boots for walking on ice and hard snow. Indeed, the sport of mountain climbing can range from an easy uphill walk to a difficult climb up a frozen waterfall