In 2013, Greg Kalkwarf finished the Boston Marathon with a personal record of 3:56:03. Minutes later, a loud boom cracked the sky. Running a marathon--through a snowstorm--up and down a 14,000-foot mountain is a challenge. But, enduring that journey served as great preparation for the life-changing moments Greg Kalkwarf experienced in a 13-month period: a raging forest fire, the tragic death of a family member, the happy birth of a baby girl, a crosswalk collision with a taxi cab, and a terrorist bombing at the finish line of the Boston Marathon. Greg's experience illustrates goal-setting, trying new challenges, determination, self-belief, and overcoming adversity. His journey encompasses a spectrum of emotions, captured in a 26.2-chapter book reflecting the miles of a marathon experience.