A babbling trailside river, which turns into waterfalls along the way, makes this New Hampshire hiking trail one to remember. Be sure to stop at the overlook, just past the 600-foot waterfall, for a scenic lunch. This is the most direct route to the summit, which allows you to reach the top in just under 4.5 miles. Reserve your spot in the Lakes of the Clouds Hut for a night before heading back down. The hut is 3 miles from the trailhead, making it the perfect turnaround spot if you're just looking for a day hike.