The Grand Canyon of the Yellowstone is the first large canyon on the Yellowstone River downstream from Yellowstone Falls in Yellowstone National Park in Wyoming. The canyon is approximately 24 miles long, between 800 and 1,200 ft deep and from .25 to .75 mi wide.
Although trappers and prospectors who visited the Yellowstone region had knowledge of the canyon earlier, the first significant descriptions were publicized after the Cook–Folsom–Peterson Expedition of 1869 and the Washburn-Langford-Doane Expedition of 1870.
Source: Wikipedia.org
Copyright: Creative Commons 3.0
Address: Park, United States
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