Altitude Acclimatization Planner
Get a personalized, science-based plan to help your body adjust to high elevation and reduce your risk of altitude sickness.
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Your Acclimatization Plan
Your Day-by-Day Plan
Symptoms to Watch For
Mild AMS (Common)
- Headache
- Fatigue or low energy
- Mild nausea
- Dizziness or lightheadedness
- Difficulty sleeping
- Reduced appetite
Severe: Descend Now and Get Help
- Severe headache unrelieved by rest and water
- Persistent vomiting
- Confusion, disorientation, or unusual drowsiness
- Difficulty breathing at rest, or a wet cough
- Loss of coordination (stumbling, can't walk a straight line)
If your symptoms get worse, or you develop any severe symptom, go down right away and call 911. Severe symptoms can mean fluid in the brain (HACE) or lungs (HAPE), which are life-threatening emergencies. Descent is the single most effective treatment. Never go higher with symptoms that are getting worse, and never leave someone with severe symptoms alone.
Practical Tips for Your Trip
Important: This tool provides general acclimatization guidance based on established wilderness medicine guidelines. It is not a medical diagnosis tool and does not replace consultation with a physician. Individual responses to altitude vary significantly. People with heart, lung, or blood conditions should consult their doctor before traveling to high elevation. Prescription medications such as acetazolamide (Diamox) can aid acclimatization. Talk to your doctor if you are interested. City elevation data from GeoNames (CC BY 4.0).
This link reopens your plan anytime. Send it to your hiking partners.
