While altitude sickness is rare at 5,000 feet, some people may experience mild, temporary symptoms. But for most travelers, adjusting to this elevation won’t be a problem. Focus on gradual ...

Altitude Sickness SymptomsAltitude sickness, also known as mountain sickness, occurs when the body struggles to adapt to reduced oxygen levels at high elevations. Symptoms can range from mild to ...

During their 19-hour hike, however, Ryan said his son began showing signs of altitude sickness, according to NBC affiliate KSNV. So the duo started heading back down the mountain.

A 14-year-old California boy walked off a 120-foot cliff in front of his horrified father — telling him he saw “snowmen and Kermit the frog” while hallucinating from altitude sickness.