Quiz: What is the significance of the Yellowstone River’s Grand Ca August 17, 2025 by Mira Thorne What is the significance of the Yellowstone River’s Grand Canyon in Yellowstone National Park? Discover more about Yellow Stone National Park at our home page. A) It is the location of the park’s largest waterfall B) It is the only place in the park where fishing is allowed C) It is the deepest canyon in the park D) It is the first canyon to be discovered in the park Submit Answer