A wilderness hut, bothy, backcountry hut, or backcountry shelter is a free, primitive mountain hut for temporary accommodation, usually located in wilderness areas, national parks and along backpacking and hiking routes. They are found in many parts of the world, such as Finland, Sweden, Norway, northern Russia, the Alps, the Pyrenees, Scotland, Australia, New Zealand, Canada, and the United States. Huts are basic and unmanned, without running water.

A mountain hut is a building located high in the mountains, generally accessible only by foot, intended to provide food and shelter to mountaineers, climbers and hikers. Mountain huts are usually operated by an Alpine Club or some organization dedicated to hiking or mountain recreation. They are known by many names, including alpine hut, mountain shelter, mountain refuge, mountain lodge, and mountain hostel. It may also be called a refuge hut, although these occur in lowland areas too.