In Mile Markers, Runner's World contributing editor Kristin Armstrong captures the ineffable and timeless beauty of running, the importance of nurturing relationships with those we love, and the significance of reflecting on our experiences.

This collection considers the most important reasons women run, celebrating the inspiring passion runners have for their sport and illustrating how running fosters a vitally powerful community.

With unique wit, refreshing candor, and disarming vulnerability, Armstrong shares her conviction that running is the perfect parallel for marking the milestones of life.

From describing running a hardfought race with her tightly-knit group of sweat sisters, to watching her children participate in the sport for the very first time, Armstrong infuses her experiences with a perspective of hope that every moment is a chance to become a stronger, wiser, more peaceful woman.

Running threads these touching stories together, and through each of them we are shown the universal undercurrents of inspiration, growth, grace, family, empowerment, and endurance.