The World’s Most Beautiful Marathon! Take it easy or take it tough…we have a race for every runner at any level. The 13th Annual Mad Marathon, Mad Half and relays, 10K and 5K are scheduled for July 7, 2024 in the gorgeous Mad River Valley, located in Central Vermont. You will be running through this extraordinary rural community on back and dirt roads, with breathtaking views of the Green Mountains, challenging rolling farmlands with tough climbs and descents, quaint villages, historic barns, covered bridges and fields of our famous Vermont cows!