A standout in both track and cross country, Walker was a first-team All-Ivy pick in 1994, 1995 and 1996 for cross country, in 1996 and 1997 for indoor track and in 1997 for outdoor track. She earned her first All-America honor in 1997 as part of the indoor distance medley relay team that competed in the NCAA championships, running the 1600 meter anchor leg in a time of 4:42.9. The squad took fourth place and set a school record of 11:14.74. She qualified for NCAA indoor competition in the mile in both her junior and senior years, finishing third at the indoor Heps in that event as a senior. Outdoors, she was the Heps champion at 3000 meters as a senior and qualified for the NCAAs in the 3000 meters that year with a personal best of 9:35.99. Competing at the NCAA championships, she finished with a time of 9:36.53 to earn her second All-America honor. Walker was a member of the 1993 women's cross country team that placed fourth at the NCAA championships and was a part of Heps championship teams in cross country (1993), indoor track (1995) and outdoor track (1995, 1997). She captained the cross country team in her senior year.
