I grew up in the high desert (altitude 5500 feet to 10,000 feet above sea level) Usually lived in the mountains about 7 or 8 thousand feet above sea level. We were outside from sun up to sun down (or later) in the summer, got our first sun burn then turned brown ( or for us lighter, freckled less pink). Now I have to get those benign skin cancers burned off every year, but my face is still fine except for a few dark spots (we called them liver spots when I was a kid). I used sun screen for a while in the 80's but that is when I started getting the skin cancers. So I don't use sun screen, I wear long sleeves and a hat now that I am an old lady with fragile skin.
My aunt an my mother both had to have melanomas taken off in their 60's. My aunt is 90 now, and looks it, but she only had that one skin cancer. She spent her days on horseback most of her life in Arizona, New Mexico and west Texas.