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.

"Even the pups know this isn't right!" Disturbing video of dog owners in national park sparks outrage: 'This is beyond wrong' ...

Speedy the bison died Thursday after spending 24 years as one of the best-known and beloved bison in the Greater Yellowstone Region. She was an ...

How can lightning and solar storms be used to map magma beneath Yellowstone? Through magnetotelluric imaging, which provides ...

The state of Montana is suing the iconic Yellowstone National Park over its plan to increase the number of bison in and ...

Sometimes people don't want to hear the truth because they don't want their illusions destroyed. – Friedrich Nietzsche Listen ...

The community is mourning the loss of Kevin Kooistra, a cherished local leader who served as the executive director of the ...

Extremely rare footage shows the cougar, or mountain lion, attempting to gain an edge on several goats perched on a cliff.

The Beartooth Plateau near Yellowstone National Park is home to some of the oldest exposed rocks on Earth. Some are covered ...

Melting ice in Yellowstone has revealed the fossilized remains of Whitebark pine trees that formed a part of a larger ancient ...

After a year of driving through 49 states, here is the best spot in each region of the US from the South's Everglades to the ...

Ultimate Yellowstone & Grand Teton 7 Day Itinerary Plan your first trip to Yellowstone and Grand Teton with ease — this ...