> They also mention this, but I'm not sure country is a great way to measure this. Death Valley and Mt Whitney, the lowest and highest altitude points in the co

> They also mention this, but I'm not sure country is a great way to measure this. Death Valley and Mt Whitney, the lowest and highest altitude points in the contiguous states, are in the same county. Citing the exception to try to disprove the rule generally doesn't work out so well. Most high-elevation counties in the US are situated in extremely large high elevation regions.