Traveling to locations with altitude heights over 5,000 feet above sea level can result in lower oxygen levels in the body.

Forty percent of people who visit high altitude locations like Denver and the Colorado Rockies can experience symptoms of altitude sickness.

At 5,000 feet above Sea Level (Denver, CO, Albuquerque, NM), there is approximately 20% less Effective Oxygen in the atmosphere.

8,000 feet (Aspen, Vail, Park City, Jackson Hole, etc), there is approximately 29% less effective Oxygen in the atmosphere.

10,000 feet (Breckenridge, CO) there is approximately 33% less effective Oxygen in the atmosphere. 12,000 feet (Mt. Baldy, Mt. Hood) there is approximately 38% less effective Oxygen in the atmosphere.

14,000 feet (Pike’s Peak, Mt. Whitney, Mt. Rainer) there is approximately 43% less effective Oxygen in the atmosphere.

19,000 feet (Mt. Kilimanjaro) ere is approximately 52% less effective Oxygen in the atmosphere.

29,000 feet (Mt. Everest), there is approximately 66% less effective Oxygen in the atmosphere.