Yellowstone Trivia Questions

Yellowstone is not the largest. Wrangell-St. Elias National Park in Alaska is over 13 million acres, more than five times Yellowstone's 2.2 million acres.

Old Faithful's average interval is about 92 minutes, not 45. Eruptions vary from 60 to 110 minutes depending on previous eruption duration.

The Yellowstone supervolcano's most recent caldera-forming supereruption happened around 640,000 years ago, creating the current caldera. Smaller non-caldera-forming eruptions have occurred since, but this was the last major event.

Yellowstone's bison herd is the oldest and largest public herd in the U.S., numbering around 5,000 animals that roam freely within the park.

Wolves were extirpated from Yellowstone by the 1920s, but 14 wolves were reintroduced in 1995, and the population has since rebounded to over 100.

The Yellowstone River originates in Wyoming but flows north into Montana, where it joins the Missouri River. It does not stay entirely within Wyoming.

Yellowstone has about 500 active geysers, more than half of the estimated 900 to 1,000 geysers worldwide, concentrated in its geothermal basins.

Yellowstone was one of the first 12 sites inscribed on the UNESCO World Heritage List in 1978, recognized for its unique geothermal features and biodiversity.