Hiking boots are footwear specifically designed for the sport of hiking. They are considered^{[citation needed]} the most important hiking gear since their quality and durability can determine a hiker's ability to move farther, faster, and more safely. Hiking boots are constructed to provide comfort for miles of walking over rough terrains, and protect the hiker's feet against water, mud, rocks, and other wilderness obstacles. Most hiking boots are also designed for other outdoor activities such as backpacking, climbing, mountaineering, trail running, hunting, and casual outdoor wear.

Hiking boots support the ankle to avoid twisting but should not restrict the ankle's movement much. They also must be fairly stiff to support the foot. A properly fitted boot and/or friction-reducing patches applied to troublesome areas can ensure protection against blisters and other discomforts associated with long hikes on rugged terrain. Some suggest a leather-lined boot over synthetic lining because it is less likely to cause blisters during a long hike.