The most anticipated meeting in the entire racing calendar, Aintree's 21 races over three days attract hundreds of millions of viewers worldwide and picking a horse out for the main event has become a tradition for many. The Grand National, first held in 1839 and won by Lottery, remains the headline race but the spring festival is packed full of world class runners and races.
150,000 punters are expected to descend on Aintree Racecourse over the three days, with Saturday being broadcast to more than 140 nations and over 600 million global fans. Each with the dream that their picks will emerge from their race victorious, in what is always a thrilling and unpredictable meeting.
You don't have to go back too far to see an upset which shocked the bookies. In 2009, Mon Mome triumphed in the Grand National after starting the race 100/1, four years later Auroras Encore won at 66/1, while Rule The World in 2016 was 33/1.
