That is definitely a challenge! I can run pretty well, but hiking is a whole different story. Especially three peaks in a day. Near me one of the big things is hiking the Appalachian Trail. It goes from the North Georgia all the way up to Maine. I had a friend who attempted a thru hike (she took six months off of work), but she had to pull out after about a month because it was just too challenging. So many really cool ways to not only challenge your body and mind, but see some of the most stunning spots on Earth! Thanks for sharing your experience!