In-N-Out, the beloved West Coast institution, opened its doors on Oct. 22, 1948 in Baldwin Park, California.
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Since its opening in southern California, the chain expanded to neighboring states including Arizona, Nevada and Oregon. Just in 2010, Texas received its first In-N-Out locations, with restaurants added in the Dallas-Fort Worth area, Austin and San Antonio.
There are 334 locations in six states.
Earlier this month, the burger joint's parent company announced the first Houston area locations.
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In-N-Out is popular for the simplicity of its menu, offering three burger options - single patty hamburgers with or without cheese, and the Double-Double, which boasts two patties with two cheese slices. The lure of In-N-Out, though, can arguably be found in its secret menu. The most popular custom way to get a burger made is by "Animal Style," which includes a healthy slathering of its Thousand Island-based sauce.
Due to the simplicity of the menu, more patrons became drawn to the restaurant over time for the speed of service, hence the name "In-N-Out."
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An official party to celebrate the anniversary is on Nov. 17 in Pomona, California.
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How does In-N-Out stack up to the Texas favorite Whataburger?
How does In-N-Out stack up to the Texas favorite Whataburger?