Denver, Colorado lays claim to the invention of the cheeseburger. The trademark for the name Cheeseburger was awarded in 1935 to Louis Ballast.
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The Yampa River below the northwest town of Craig, Colorado holds northern pike in the 20-pound range, while the Roaring Fork and Frying Pan rivers are prime spots for trout fishing.
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Colorado contains 75% of the land area of the U.S. with an altitude over 10,000 feet.