Although mountaineering is a sport, it is much more than that for its practitioners. It involves making excursions in the mountains using a combination of technique, knowledge and skill. It began to gain in popularity at the end of the 19th century with the creation of the Centre Excursionista de Catalunya (Catalonia Hikers´ Centre). At that time, it was not only considered to be a sport, but also a cultural activity and a way to gain in-depth knowledge about the region. Today the term "mountaineering" has a sportier and more specialised connotation than the old word "hiking". This new term began to be officially used in 1940, when the category of mountaineering in Catalonia was included in the sporting guidelines of the Spanish Federation of Mountain and Climbing Sports. Later, the practice was divided into two main trends: one for freestyle mountain excursions for recreational purposes, which led to the creation of hiking associations and clubs and was fed by the scouting movement;and another more commercial sport which has become increasingly widespread and consists of organised excursions with specific itineraries, for recreational purposes, with specialised companies; or as part of a club or with companies that provide the necessary resources and services. This second trend has become one of the mainstays of tourism in the area. The Agrupació Excursionista Muntanya (Catalan Mountain Association) in Barcelona organises outings on Sundays from October to May. The treks are no longer than eighteen kilometres, and involve between approximately four and six hours of walking. The excursions are open to everyone and there is always at least one guide and one sweeper group.