Swimming in Yellowstone National Park

Numerous waterways delight kids; however, unless you come during July and August, you'll likely want to forego swimming due to the extremely cold water. Streams and lakes seldom have a chance to warm up in this climate, where nights can be subfreezing, even in summer. Boiling River and Firehole Canyon Drive are the only two spots in the park where visitors can sample waters warmed by geothermal activity.