The U.S. is a vast tapestry of natural wonders, from jagged peaks and ancient forests to sun-baked canyons and glacial valleys. For those who seek adventure on foot, the country offers an unparalleled array of hiking trails that challenge the body, soothe the soul, and leave an indelible mark on the memory. Lace up your boots, pack your sense of wonder, and prepare to conquer these 10 must-do hikes.