The lawsuit, filed by the Alliance for the Wild Rockies and Council on Fish & Wildlife, comes less than three weeks after the state of Montana also sued the park.

Photographer Drew Simms braved extreme winter conditions in Yellowstone National Park to document its wildlife enduring a freezing temperatures as low as -37°F (-38.3°C). Over a week-long expedition, ...

Montana DOC officials say transferring the prisoners is a necessary step to manage prison populations as well as make necessary upgrades and additions to the main state-run facility in Deer ...