Hayden Valley

A brown bear walking across a field with tall grass and purple flowers under a clear sky.

Brown Bear foraging at Sizzling Basin, Yellowstone National Park

Mud Geyser in Yellowstone National Park

A large, shallow pool of water with visible ripples and steam rising from it. Tall trees surround the pool.

Black Dragon's Caldron and Sour Lake in Yellowstone National Park

A wooden bridge over a rocky stream, with steam rising from a geothermal vent nearby and trees on the hillside in the background.

Sizzling Basin and Churning Caldron in Yellowstone National Park

Mud Caldron in Yellowstone National Park