Eileen Waters Connolly was a trailblazer in American long-distance running, part of the first generation of women to compete in the sport. In 1972, she made history by setting a world record in a 50-mile race on a track in Santa Monica, finishing in 7:05:31. Even more impressive, she ran negative splits—completing the second half 23 minutes faster than the first. A year later, she returned and broke her own record, cutting 10 minutes off her time. She died in 2016 at 71 from adenoid cystic carcinoma (ACC), a rare form of cancer. As she aged, she never lost her sense of humor or self-effacing nature. She was quoted as saying, "When you get
old, you just show up and most likely you'll win your age group."

When you think about excellence in the marathon, the name Deena Kastor inevitably jumps to mind. After all, the 52-year-old held the American record in the distance for a whopping 19 years, setting it first in London in 2003, then bettering her own mark just three years later when she became the first American woman to run under 2:20. In fact, Kastor—a three-time Olympian, World Marathon Majors champ, World Cross Country medalist, and holder of national records from the 5K up to the 26.2—was drawn to distance from the very first time she hit the track.

Long before Roberta Gibb and Sara Mae Berman unofficially ran the Boston Marathon (1966 and 1969 respectively), Arlene Pieper Stine became the first woman to officially finish a sanctioned marathon in 1959, when she ran the Pikes Peak Marathon—ascent and descent—in 9:50:20 when she was 29. She was accompanied by twelve men and a horse. Pieper Stine ran in the men's category and was not given a special category or fanfare for her historic finish. She never ran another marathon and her pioneering accomplishment fell into obscurity until 2009.