Yellowstone closed after historic floods; some areas cut off". AP NEWS. June 14, 2022 . Retrieved June 14, 2022. Main articles: Geothermal areas of Yellowstone, Yellowstone Caldera, and Yellowstone hotspot Volcanism [ edit ] Columnar basalt near Tower Fall; large floods of basalt and other lava types preceded mega-eruptions of superheated ash and pumice. Caldera rim on the horizon south of Yellowstone Lake Main articles: Trails of Yellowstone National Park and Angling in Yellowstone National Park Union Pacific Railroad brochure promoting travel to the park (1921) Yellowstone, History and Culture". National Park Service. Archived from the original on September 22, 2013 . Retrieved May 8, 2011.

Threatened and Endangered Species". National Park Service. July 26, 2006. Archived from the original on October 13, 2007 . Retrieved March 19, 2007. Morton, Tom (August 26, 2007). "The perfect place for the perfect crime". Casper Star Tribune. Archived from the original on February 17, 2012 . Retrieved July 18, 2011.Directions". National Park Service. January 4, 2007. Archived from the original on September 23, 2013 . Retrieved January 4, 2007. Haines, Aubrey L. (2000). "The Folsom Party (1869)". Yellowstone National Park: Its Exploration and Establishment. U.S. Department of the Interior. Archived from the original on June 11, 2007 . Retrieved October 9, 2007. Culpin, Marcy Shivers (May 22, 2002). "National Register of Historic Places Nomination Form: North Entrance Road Historic District". Yellowstone National Park: National Park Service . Retrieved April 27, 2020. Precipitation in Yellowstone is highly variable and ranges from 15 inches (380mm) annually near Mammoth Hot Springs, to 80 inches (2,000mm) in the southwestern sections of the park. The precipitation of Yellowstone is greatly influenced by the moisture channel formed by the Snake River Plain to the west that was, in turn, formed by Yellowstone itself. Snow is possible in any month of the year, but most common between November and April, with averages of 150 inches (3,800mm) annually around Yellowstone Lake, to twice that amount at higher elevations. [153]

Heritage and Research Center". National Park Service. Archived from the original on November 24, 2009 . Retrieved November 24, 2009.

a b "Weather". National Park Service. December 20, 2006. Archived from the original on March 15, 2007 . Retrieved March 20, 2007.