15,000 to 14,000 ft, 1,000 ft/day
Inputs
Result
9,000 ft gain / 1,000 ft/day = 9 climbing days. 9/3 = 3 rest days. Total: 12 days.
Total Days
12 days
Gain
9,000 ft
Risk
Low
Acclimatization Schedule
12 days
9 climbing + 3 rest
Total Gain
9,000’
Target
14,000’
AMS Risk
Low
Inputs
Result
9,000 ft gain / 1,000 ft/day = 9 climbing days. 9/3 = 3 rest days. Total: 12 days.
Inputs
Result
10,000 ft / 800 ft/day = 13 climbing days + 4 rest = 17 total.
Above 8,000 feet, increase sleeping altitude by no more than 1,000 feet per day with a rest day every 3,000 feet of gain. Faster ascent rates significantly increase AMS risk.
| Ascent Rate | AMS Risk | Who | Example |
|---|---|---|---|
| 500 ft/day | Low | Conservative | 12,000→14,000 in 4 days |
| 1,000 ft/day | Moderate | Standard | 10,000→14,000 in 4 days |
| 1,500+ ft/day | High | Risky | 10,000→14,000 in 3 days |
Acute Mountain Sickness (AMS) starts with headache, nausea, fatigue, and dizziness. Symptoms typically appear 6–12 hours after ascending too quickly.
Yes. Rest days allow your body to produce more red blood cells and adjust breathing patterns. Spending an extra night at the same elevation dramatically reduces AMS risk.
Most people begin to notice altitude effects above 8,000 feet (2,400 m). Above 10,000 feet, proper acclimatization scheduling becomes important for safety.
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Last Updated: Mar 20, 2026
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