The Bristol International Balloon Fiesta is an annual four day free summer festival of hot air ballooning in Bristol, England. Teams from the UK and other parts of the world bring their hot air balloons to the site and participate in mass ascents where as many as 100 balloons may launch at a time. The event was first held in 1979, building on a strong local tradition of ballooning in and around Bristol, stretching back to the eighteenth century. The festival is now one of the largest in Europe. It is common to have crowds of over 100,000 on each of the four days of the festival. It takes place in a large country estate, Ashton Court. Mass launches are made twice a day, at 6am and 6pm, subject to weather conditions. Richard