We normally reside at about 7500 feet, but even then, at above 10000 feet I notice the effects of the altitude. Cumbres Pass is over 10,000 feet in elevation. When we went on our hike, I noted several symptoms of altitude sickness in myself and immediately took steps to prevent it.
Drink lots of water
As we started out on our hike, I felt a dull headache. Dehydration happens fast at this elevation. I was not even thirsty, but with a simple pinch test (pinch the skin on the back of your hand. If it doesn’t immediately return to normal, you’re getting dehydrated.) I could tell I was definitely needing water.
Consume extra protien
I also indulged in the salty snacks and made sure I consumed some extra protein. Thus, I did not suffer any nausea or other symptoms of altitude sickness, as I did the last time we made a jaunt to the high country, in Leadville, CO.
One of the reasons for altitude sickness is the lower levels of oxygen present in the air at high elevations. Slow down and breathe deeply to help your body adjust.
Take a nap
While the guys were fishing, I drowsed in the sun, enjoying its warmth after too many months of winter.
Most people will adjust to a higher altitude within 2-3 days. When we went to Leadville, I didn’t realize I was suffering from altitude sickness until it was well underway. My headache persisted through the weekend, and nausea made me lose my appetite.
Move to a lower altitude
If all else fails, head back down to lower ground. As soon as we were back to the car and driving down the hill from Leadville, My headache began to subside. Once we got home, it was gone.
More info on moderate to severe altitude sickness see: http://www.traveldoctor.co.uk/altitude.htm