Colorado contains 75% of the land area of the U.S. with an altitude over 10,000 feet.
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Hundreds of thousands of valentines are re-mailed each year from Loveland, Colorado.
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Lieutenant Zebulon Montgomery Pike explored the southwest portion of the Louisiana Territory in 1806 and though he never climbed the peak that bears his name (Pikes Peak, Colorado), he did publish a report that attracted a lot of interest to the area.