There are two theories how the Christmas Mountains in Texas got their name. One says that the peaks resembled a line of Christmas trees. The other rests upon a local legend that really should involve cannibalism.
Local folklore has it that an area ranch family decided to spend the Thanksgiving holidays camping in the mountains and got smacked by a freak blizzard that prevented the family from escaping until Christmas.
The property officially shows up as "Christmas Mountains" in the 1918 Corps of Engineers U.S. Army topographic map and also on the 1904 University of Texas Mineral Survey Map completed by Hill and Udden, according to General Land Office officials.
The land commissioner believes "the family story sounds more plausible than the Christmas trees from a distance story." Christmas trees weren't even introduced to Texas until the middle 1800s, and they didn't become common until the 1920s, he said. [Link]