
In the middle of Yellowstone National Park sits Hayden Valley, located along the Yellowstone River between Yellowstone Lake and Yellowstone Falls. Hayden Valley is a great place to view wildlife including bison
herds, coyote, river otter, grizzly bear and more.

Hayden Valley was once under water, part of a much larger Yellowstone Lake. As the lake
receded, over the years, it left behind this large valley filled with rolling green hills. The valley is also home to several small geothermal features including Mud Geyser, Mud Volcano, Black Dragon
Caldron, Sulphur
Caldron and Sulphur Spring.

Hayden Valley was discovered back in 1870 by the
Washburn-
Langford-
Doane Expedition, although Native Americans and fur traders had visited the valley prior to that. The expedition looked down on the valley as they reached the summit of Mount
Washburn to the north. The valley was later named, back in 1880, in honor of Ferdinand
Vandeveer Hayden who surveyed much of what is Yellowstone back in 1871. His surveys later helped in the forming of the worlds first National Park.