Katherine (Katie) Rainsberger (born August 18, 1998) is an American long distance runner from Colorado. Her mother is former distance star Lisa Larsen (Weidenbach) Rainsberger. She was also a swimmer who qualified for the Olympic team trials in 1980, though the U.S. boycotted the games. Lisa was a top-ranked long distance runner during most of the 1980s. She won the Boston Marathon in 1985, the last American woman to do so until Desiree Linden's win in 2018. Katie's father, Ellis, played football at Kansas State University. Lisa switched to the triathlon not long before Katie was born.