Bottom Line trivia By Staff | Jul 14, 2019 1 / 2TX. Yellowstone National ParkPhoto supplied, Dan Breckwoldt, stock.adobe.com2 / 2This undated photo shows an entrance to Yellowstone National Park.Photo supplied, Syuji Honda, stock.adobe.com ❮ ❯ About 5 percent of Yellowstone National Park is covered in water; 80 percent of the park is forest. Tx Starting at $4.32/week. Subscribe Today