We all know that regular, sustained exercise is essential for healthy aging. But some of us take that advice to its extreme: For example, consider Dale Sanders. At age 82, he is currently on a 2190 mile journey to be the oldest person to thru-hike the Appalachian Trail. Given that only one in four hikers ever complete that goal, and that the average age of an Appalachian hiker is about 25 years old, Dale is certainly out of the ordinary. He’s also a very competitive guy, having already become the oldest person to paddle the Mississippi from source to sea. Equipped with hiking poles and an alert system in case of trouble, Dale hopes to finish the journey by September, which means he would be out on the trail for about 6 months. Feel inspired? Read more about the man known as “Grey Beard” Here, and follow along his journey by going to his “Dale On The Trail” website Here.