Silver Cord Cascade
Silver Cord Cascade is a horsetail type waterfall on Surface Creek, a tributary of the Yellowstone River in Yellowstone National Park. Surface Creek flows out of Ribbon Lake off the South rim of the Grand Canyon of the Yellowstone and plunges to the Yellowstone River. It is considered the tallest waterfall in Yellowstone.
Multnomah Falls
Multnomah Falls is the tallest waterfall in the state of Oregon. It is credited by a sign at the site of the falls, and by the United States Forest Service, as the second tallest year-round waterfall in the United States. However, there has been some skepticism surrounding this distinction, as Multnomah Falls is listed as the 156th tallest waterfall in the United States by the World Waterfall Database (this site does not distinguish between seasonal and year-round waterfalls). The World Waterfall Database disputes claims that Multnomah Falls is the fourth-tallest waterfall in the United States, which has been claimed in such sources as the "Encyclopedia of World Geography" (2014).