I grew up in Denver and ABQ, both a mile or more high. That is the one measurement I always got right in school. I could tell you inches, it might be better because I would have bigger numbers, but this is hard enough.
I did another 2.1 miles today. 80*F, 80% humidity. :-( I made it up the first little hill to get out of my area. There are two hills, stair-stepped going one way, and a larger hill going the other way. Have not made it up the larger one, and have walked up the two stair-stepped ones before, today I got up over the first stair. I feel like "the Great Escape"; just trying every day to get a little closer to getting out of my own little area and out into the big, wide world. :-)