When temperatures dip below zero in Yellowstone National Park, tourists are scare but the park’s 4,500 bison carry on out of necessity.

Yellowstone’s famous geothermal areas are a lifesaver for the bison in winter. Those steaming hot springs and geysers aren’t just cool to look at; they create little pockets of warmth where ...

It’s no secret that Yellowstone National Park can be jampacked in the summer, when up to 1 million people jockey for space ...

MAMMOTH HOT SPRINGS, Wyoming – Yellowstone National Park’s winter season begins Sunday ... Expect to encounter bison and other wildlife on park roads. Slow down or pull over until they ...

From spring 2014 until summer 2015 ... are extremely low. In winter Yellowstone can be a tough place for grazers; to find grass, bison sometimes use their massive heads to plow away deep snow.

Editor’s Note: This story accompanies the May 2016 issue of National Geographic magazine, devoted entirely to America’s first national park. Find more at natgeo ...