Hiking as defined by Siri Knowledge:
Man hiking silhouette in mountains, sunset and ocean inspirational landscape. Male hiker with walking sticks on top of mountain looking at beautiful night sea landscape.
“Hiking is the preferred term, in Canada and the United States, for a long, vigorous walk, usually on trails, in the countryside, while the word walking is used for shorter, particularly urban walks. On the other hand, in the United Kingdom, and the Republic of Ireland, the word “walking” is acceptable to describe all forms of walking, whether it is a walk in the park or backpacking in the Alps. The word hiking is also often used in the UK, along with rambling, hillwalking, and fell walking.