Known as the Matriarch of the Tetons, 399 was a 28-year-old who lived her life primarily in Grand Teton National Park and was arguably the most famous bear in the world.

In this op-ed, a former Yellowstone park ranger turned independent grizzly bear researcher writes that states will institute grizzly bear hunting if grizzlies lose protection under the Endangered Species Act.

In Teton Valley, Idaho, where water is as precious as its native trout, irrigators and environmental groups have teamed up to recharge the area’s diminishing aquifer. In the process, they want to do something novel: find someone to pay farmers for the effort.

In 1995, the gray wolf was reintroduced into Yellowstone National Park. Nearly 30 years later, Colorado has done the same. How will it play out?

Smoke Elser and Eva-Maria Maggi discuss their new book, Hush of the Land, chronicling decades of mule-packing trips in the Bob Marshall Wilderness.

In his latest essay, MoJo contributor Todd Burritt examines nature, friendship and the enduring magic of Yellowstone's backcountry.