2013 Grand National to modifications made for the previous year's race, Aintree announced that a number of further changes had been made for the 2013 National. Twelve of the 16 fences on the course were rebuilt with the timber frames within them replaced by a softer material known as "plastic birch". The fences are still covered with at least 14 inches of spruce and will remain the same height. The starting line was also moved 90 yards closer to the first fence, further away from the spectators' stands and thereby reducing slightly the overall distance. Aintree and the Professional Jockeys' Association jointly issued
Aintree Aintree Aintree is a village and civil parish in the Metropolitan Borough of Sefton, Merseyside. Historically in Lancashire, it lies between Walton and Maghull on the A59 road, about north-east of Liverpool city centre, in North West England. It is best known as the site of Aintree Racecourse, which since the 19th century has staged the Grand National horserace. During the 1950s and 1960s, there was also a three-mile-long international Grand Prix motor racing circuit on the site, which used the same grandstands as the horserace. A shorter form of the racing circuit is still used for various motorsport events.