Good Morning Bob,
This tour travels to altitudes around 8,000 feet, a height at which you may begin to feel the effects of altitude sickness. This should not be a problem, although everyone has to take it easy. If you suffer from high blood pressure, respiratory conditions or have other concerns, please consult a doctor before you book this holiday.
San Pedro de Atacama lies at the entrance to the driest desert on earth, the Atacama Desert. The town itself sits at an average of 2,407 metres, just over the threshold for altitude sickness so a minority of visitors experience mild discomfort such as dizziness or headaches.
I hope this helps.
Kind Regards,
Mildred