High Altitude Precautions
Increase in altitude = decrease in oxygen available in the air. As a result many people suffer from High Altitude Sickness. Symptoms include:

• shortness of breath
• difficulty sleeping
• dizziness and nausea
• reduced appetite

To combat the symptoms of high altitude sickness:

• drink plenty of water
• avoid excessive tobacco or alcohol consumption
• ask your hotel concierge for a humidifier for your bedroom
• get plenty of rest (NOTE: Sleeping during the day is not recommended because respiration during sleep deepens, which can exacerbate altitude sickness symptoms.) 

Adequate Clothing
Bring clothing that you can layer so you can comfortably adjust to temperature changes.  Ideally, your first layer should 'wick' - keeping moisture away from your skin and ensuring your core stays warm.   Your external layer should provide wind and moisture protection.

Sun Protection
At 10,000 feet (3,048 m), exposure to the sun is 40% greater than it is at sea level. Sunscreen (at least SPF 30) is recommended for all exposed skin, particularly the face, lips and neck. Be certain to protect your eyes with goggles or sunglasses.