AINTREE, England -- Katie Walsh will attempt to become the first female jockey to win the Grand National when she rides Seabass on Saturday.Walsh's father Ted (trainer) and brother Ruby (jockey) won the National, and she'll aim to complete the family set aboard Seabass, who finished third last year."There's a lot of fences to be jumped," Walsh said. "You need a lot of luck. But I'm looking forward to it again, and it's good to have last year's experience under my belt."Since the Grand National stopped being a male-only event for jockeys in 1977, 15 women have entered the world's most famous jumping race.Like last year, Walsh will be going head-to-head with brother Ruby in the Aintree Festival showpiece, with the siblings riding the two favorites. The older, more experienced Walsh mounts On His Own, the current 15-2 favorite.