That's what the pilot said. "We'll be cruising today at 37000 feet. I'm not sure where on the Mississippi we crossed over it, but I do know we went over the Ouachita range maybe 45 minutes before I saw the big river.37,000ft high, huh? hmmmm, you were on an airplane, right? haha! Take care have a good trip and I will try to have this place snow covered once again by the time you get back.