Against the advice of her coach, she entered a Missouri race, a portion of the inaugural
Avon Marathon series. Winning the race qualified her for the series championship in Los Angeles, where she placed second behind
Julie Brown. That race served as the qualifier to the World Championships. She was a surprise to take the silver medal at the
1983 World Championships in
Helsinki, Finland. While
Grete Waitz was a clear winner, Dickerson was in fourth place behind
Rosa Mota and
Raisa Smekhnova, that group having already dispatched stars
Joyce Smith,
Laura Fogli and
Christa Vahlensieck. Dickerson passed Mota outside the stadium then surged to dramatically beat Smekhnova (a sub-4 minute
1500m runner) on the track inside the stadium. Injuries prevented her from competing in the 1984 Olympic Trials. She qualified for the 1988 trials by winning the
Baltimore Marathon, but faded in the middle of those trials. After getting her degree in Engineering, she went to the
Harvard Business School. In 2015, she returned to her alma-mater high school as an assistant coach before her death. ==Achievements==