Mary Walker (born January 26, 1959) is the 2012 American professional World Barrel Racing Champion.
Walker overcame severe hardships in her life to become the oldest woman, at 53, in the Women's Professional Rodeo Association (WPRA) to win a world championship in barrel racing at the National Finals Rodeo (NFR) in 2012.
She was later surpassed by Mary Burger in 2016 when Burger won at age 68.
She lost her only child to a car accident in 2011.
Two months later, Latte, her horse, fell on her during competition and severely injured her.
It was about a year and a half after these incidents that she won her world title.
Walker was inducted into the National Cowgirl Museum and Hall of Fame in 2013.