Mountaineering is a sport that combines climbing and hiking up mountains. Done on regular terrain, rocky areas, and ice or snow slopes, mountaineering merges a series of techniques and requires a highly technical approach. Despite the image we have of highly-trained, modern, methodical climbers, the truth is that people have been practicing mountaineering for centuries. The famous iceman, Ötzi, whose remains date back 5300 years, was found high in the Alps in 1991. While many climbed mountains prior to him, it was Petrarch, a 14th century Italian poet, who was the first known to have climbed all the way to the top of the Alps. Petrarch later wrote extensively about it. He is often considered the father of Alpinism.

Mountaineering is a sport with many hazards, which are often divided into three main groups: weather, falling, and avalanches. Weather is one of the primary dangers of mountaineering. Blizzards may cause poor visibility, leading to climbers getting lost or falling into the void. Even in summer, weather can be deadly, since lightning is likely to strike on the highest points, including mountaintops and rock edges. Besides snow, avalanches can consist of falling rocks, ice, and even gear. Falling rocks are a much more common danger than snow avalanches; they are also a lot harder to predict, which exposes climbers to a higher risk. Climbers also run the risk of slipping on the ice and falling into crevasses. Equipment failure accounts for only a small percentage of mountaineering accidents.

Climbers use a variety of equipment when mountaineering. This may include anything from snowshoes and skis to ropes and harnesses. They also require some type of shelter, as mountaineering often requires them to spend nights as well as days up in the mountains. A sleeping bag may be enough in summer, but tents are the shelter of choice in windy winter conditions. Some climbers opt for digging snow caves while high up in the mountains.

Famous mountaineers include Joe Simpson, who wrote the book Touching the Void, and Appa Sherpa, who set a world record by climbing Mount Everest 16 times. Sir Edmund Hillary and Tenzing Norgay also hold records in mountaineering. They were the first ones ever to reach Everest's summit in 1953.