The sport of running has been around for centuries but has evolved with time to become one of the most popular sporting forms of modern times. With the evolution came the adjustments and creations of new races and ways to compete. The purpose of this book is to explore various races now available to athletes or fitness enthusiasts. The sport of running has been around for centuries but has evolved with time to become one of the most popular sporting forms of modern times. With the evolution came the adjustments and creations of new races and ways to compete. The purpose of this book is to explore various races now available to athletes or fitness enthusiasts.