Quiz: What event in the late 1800s led to the establishment of Yel July 15, 2025 by Mira Thorne What event in the late 1800s led to the establishment of Yellowstone as a national park? Discover more about Yellow Stone National Park at our home page. A) The discovery of gold in the Yellowstone region B) The Hayden Geological Survey of 1871 C) The arrival of the transcontinental railroad D) The Battle of Little Bighorn Submit Answer