Forever Young: King Becomes Oldest Female Jockey to Win Race in North America by Press Release|05.30.201305.30.2013|7:05am1:15pm Diane King became the oldest female jockey to win a race when she rode Ledgehill to victory at Thistledown ThistleDown Racino became home to racing's eldest female jockey to win a thoroughbred race in North America today. Diane King, 67, won in the 8th race today at ThistleDown, riding her own horse, Ledgehill. It was a hard fought win as Diane beat leading lady jockey Jane Magrell in a photo finish. Diane has won more than $1.6 million in purses throughout her storied career spanning more than five decades. She exercises horses every morning at ThistleDown and is renowned for her expertise in developing race horses. Diane is considered a pioneer for female jockeys in Northeast Ohio. The trainer of Ledgehill is Bobby King (Diane's husband).