Guthrie raced in the Firecracker 400, featuring three women.
On July 4, 1977, Janet Guthrie competed in the Firecracker 400 at Daytona International Speedway, a landmark race featuring three women competitors: Guthrie, Lella Lombardi, and Christine Beckers. This marked the first time since 1949 that three women participated in the same NASCAR event. Their involvement in this race was significant not only because it challenged the gender norms prevalent in racing but also showcased the growing acceptance and recognition of women in motorsports.