Yellowstone Timeline By _baller_69_ 9000 BCE Yellowstone was home to some indians 1807 John Colter discovered what would later be Yellowstone Mar 1, 1872 Yellowstone was established the first national park 1883 Railroad arrived in Yellowstone allowing easier access 1886 The U.S. Army managed the park until 1918 1915 Automobiles are allowed into the park 1916 National park service is created 1929 Boundary adjustments made 1988 The "summer of fires" started 1995 14 wolves were brought to Yellowstone to increase population
