Climb past a riot of purple and pink wildflowers en route to 360-degree views on this classic summit hike. The trail begins by crossing patches of forest and meadows to Cascade Lake, a great spot for fishing or even swimming on hot days. Then hoof it 1,400 vertical feet in 2.6 miles through a whitebark pine forest to the Observation Peak summit. There’s an old wooden fire tower up here, but you’ll be more interested in the encompassing views of the Gallatins, Absarokas, and the Grand Canyon of the Yellowstone.