Union Falls in Yellowstone National Park. miles - Moderate to Difficult. At a height of 260 feet, Union Falls is the second highest waterfall in Yellowstone. Its unique shape makes it one of the park's most picturesque landscapes. Combine this hike w
Old Faithful Area Trail Map - Yellowstone National Park. Don't miss Riverside Geyser and Grotto Geyser. Much more impressive than Old Faithful in my opinion. Nice hike from Biscuit Basin to Old Faithful where you can see both of these geysers and more.