You must record your miles at the fitness center each week. Fitness Center or outdoor miles count as long as your heart rate is elevated to 110 bpm for most of the workout. So, start biking, running, walking, rollerblading, rowing, swimming your way to 100 miles! Biking miles must be divided by three. Pedometer steps do not count unless heart rate is elevated. Check at sign-up to see if your group fitness class counts. First 80 people to 100 miles will receive a t-shirt.