Living at high altitude reduces risk of dying from heart disease: Low oxygen may spur genes to create blood vessels. Summary: Researchers have found that people living at higher altitudes have a lower chance of dying from heart disease and live longer.
Jeanne and I live at 8,400 feet (2.560 meters). We were talking about visitors coming (for workshops, friends, etc.) and if you are coming from a low elevation what you need to be aware of. There is a thing called Acute Mountain Sickness (AMS). It's real and can be very disabling for some people.
The best defense is to start at 5,000 feet and stay there for 3 days, drinking water like crazy and resting. Then, come up to the higher elevation and give yourself a day or two to adjust. That usually works.
Beyond the AMS, there is the sun! The sun up here will fry you fast! The UV is very very high up here and we have 300 days of sun every year. It's difficult NOT to be out in it. Water, clothing that covers your arms, legs, etc., and a hat. This is the best way to protect yourself from burning up. You will dehydrate and get very sick.
There's a lot to think about when we are considering having people visit.