Running of the bulls the market, men would try to speed the process by hurrying their cattle using tactics of fear and excitement. After years of this practice, the transportation and hurrying began to turn into a competition, as young adults would attempt to race in front of the bulls and make it safely to their pens without being overtaken. When the popularity of this practice increased and was noticed more and more by the expanding population of Spanish cities, a tradition was created and stands to this day. The Pamplona encierro is the most popular in Spain and has been broadcast live by
Running of the bulls the Raia in Sabugal, Portugal, with horses leading the herd crossing old border passes out of Spain and using the medieval 'Forcåo', or the bull run of Navalcarnero held at night. Other "encierros" have also caused fatalities. "Bous al carrer", "correbou" or "correbous" (meaning in Catalan, 'bulls in the street', 'street-bulls') is a typical festivity in many villages in the Valencian region, Terres de l'Ebre, Catalonia, and Fornalutx, Mallorca. Another similar tradition is "soltes de vaques", where cows are used instead of bulls. Even though they can take place all along the year, they are most usual during local festivals