I don't run often, but I hike a TON. 10+ mile hikes, 3-5 times a week, over moderate elevation changes. After three weeks at Yosemite in July a couple years ago, I've completely moved on from heavy hiking boots, to Inov8 trail shoes. Ultralight, 0-4mm drop. Best move I've ever made. Just did a week in the Canadian rockies, over HEAVY terrain, and rock scrambles. No more overheating, stronger feet, and I can go MUCH further distances.