This article describes Marathon Month, a workplace wellness program for Extension employees. The program promoted physical activity by challenging employees to walk or run the length of a marathon (26.2 mi) or half marathon (13.1 mi) over the course of 1 month. Of the 317 participants, 90% achieved a self-set goal of completing a full or half marathon, and 31% reported losing weight, with an average weight loss of 4.2 lb per person. Another reported benefit was increased workplace camaraderie. A number of practical ideas, such as sending email reminders and using social media, are provided to facilitate replication in other states.