Fun Fact: Male grizzlies weigh 200–700 pounds, while females weigh 200–400 pounds. These bears may live 15-30 years.

Fun Fact: The magnificent colors of the Grand Prismatic Spring are a result of microorganisms called thermophiles, or heat lovers. When grouped together (in the trillions!) they often appear as mats of color.

Fun Fact: Situated at 7,733 feet above sea level, Yellowstone Lake is the largest high elevation lake in North America.

Fun Fact: Yellowstone is the only place in the United States where bison have lived continuously since prehistoric times.

Fun Fact: The Arch was not originally intended to honor Roosevelt, but was so named because the president happened to be vacationing in the park during the Arch’s construction, and was asked to speak at the dedication ceremony.