For some reason, this specific cache elevation is way off by 9,000 ft:
This cache shows as having an elevation of 9,288 ft while others in the immediate area show elevations of 300-500ft. The highest point in the US east of the Mississippi is in NC and there's virtual at https://www.geocaching.com/geocache/GC83EA_high-country with an altitude of 6,654 ft.
FAQ indicates "if you find an entry that seems to be off by a lot more than in other services, feel free to report it so that we can investigate." so I'm posting here in hopes maybe one of the other services has a more appropriate 9,000 ft adjustment for this spot.