Quito is located at 9,350 feet above sea level, where the air is much thinner than at sea level. Most healthy people shouldn’t have an issue adjusting to the air in Quito, but it can pose problems for some travelers, especially if you fly there directly from lower elevations. If you are concerned about developing altitude sickness, it’s a good idea to start your trip at lower elevations, and adjust gradually. Drive first to 5,000 feet, spend a night, then go on to Quito. For travelers who plan to climb one of the volcanoes, it’s absolutely necessary to take time to acclimatize to the lower levels of O2 before summiting. If you have trouble breathing or experience severe symptoms, visit a doctor or get to a lower altitude immediately.