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
1951 Grand National course. All of the horses returned safely to the stables. In the long history of the Grand National only 13 mares have won the race, Nickel Coin being the most recent. 1951 Grand National The 1951 Grand National was the 105th renewal of the Grand National horse race that took place at Aintree Racecourse near Liverpool, England, on 7 April 1951. A crowd of 250,000 people saw the race won by Nickel Coin at odds of 40/1. The nine-year-old mare was ridden by jockey John Bullock and trained by Jack O'Donoghue. Royal Tan, who won in 1954, finished second, and