Morgan attended Diamond Bar High School, where she was a three-time all-league pick and was named All-American by the National Soccer Coaches Association of America (NSCAA).[1] At the school, she was known for her speed and sprinting ability.[20] Morgan played for Olympic Development Program (ODP) regional and state teams as well.[19] She later credited the program as an integral part of her development as a soccer player: "... programs like ODP helped me especially because I did come into the club scene late and it was important for me to play as much as possible, play with the best players and learn from the best coaches.