Mountaineering (also referred to as ‘mountain climbing’) is the sport of climbing a mountain. Regardless of the length of the trip which can range from a few hours to multi-day expeditions, mountaineering is more physically demanding than hiking. Mountains often provide a mixed terrain (with the presence of rock, ice and snow), so climbers need to be able to navigate and negotiate through a wide variety of conditions. Depending on the case, mountaineering may involve using climbing equipment and combining a series of related skills like scrambling, climbing, glacier travel, ice climbing, rock climbing or mixed climbing in variable weather conditions for up to four to twenty-four hours a day. Besides reaching a summit or the success (the main objective) of a mountaineering expedition lies in overcoming safely every hazard along the route.