She ran the Boston Marathon unofficially in 1978 and finished in 2:46, a time which would have placed third in the open women's division and a record for her age group [1]'.

Graduating in Harvard, MA, in 1978, she left behind countless records, including the national high school indoor 1500-meters run.

in history in 1983 after completing a 93-page long senior thesis titled "The Harvard Shakers: A Study of the Rise and Decline of a Community.

The 1992 race was held at Franklin Park in Boston, on some of the same trails where she had won several Massachusetts state high school championships.

In 2023, Jennings revealed that she had suffered sexual abuse at the hands of her longtime coach John Babington starting from when she was 15 years old.