At elevations of 5,000 feet, the air is thinner and air pressure is lower than at sea level. It is not unusual for visitors to feel lightheaded for a day or two until they adjust (but actual altitude sickness is very rare). At this altitude, skies are a clearer, brighter blue than at sea level. | At elevations of 5,000 feet, the air is thinner and air pressure is lower than at sea level. It is not unusual for visitors to feel lightheaded for a day or two until they adjust (but actual altitude sickness is very rare). At this altitude, skies are a clearer, brighter blue than at sea level. |