Mary Culbertson, race director of this month's American Home Fitness Detroit Women's Half Marathon & 5K on Belle Isle, shares race details in this episode. The event, now in its third year, attracts thousands of runners to its expo and race the weekend of Sept. 19-20 in the heart of Detroit. Heather ran the half marathon last fall, along with several of her running friends, and this year she'll return to run again. Her daughter Emma, a high school cross-country runner, will again join the fun by running the 5K. Michigan Runner Girl also will again have a booth at Saturday's expo, held at the Marriott Renaissance Center. Mary, a five-time marathoner who lives and runs in Saline, Michigan, talks about the Belle Isle race course and expo as well as her own running journey.