Larson was born in
Mesa, Arizona, one of seven sisters. She later moved to
Boise, Idaho, where she attended Boise's
Centennial High School for three years and graduated from
Mountain View High School in Mesa, Arizona, in 2010. She swam for the Centennial Patriot and Mountain View Toros high school swim teams. As a senior, she was the state runner-up in the 100-yard breaststroke. She also lettered in softball and track and field. ==College career==