Mariana Ysrael (born 13 April 1963) is a Guam long-distance runner.^[1] She competed in the women's marathon at the 1988 Summer Olympics.^[2] Her father, Alfred, was a businessman and philanthropist.^[3] She later became a doctor, graduating from Stanford University and the UCLA,^[4] before setting up a practice in California.^[5][6]