Acclimatization Day Planner
The "climb high, sleep low" rule is universal, but translating it into a day-by-day Bhutan trek schedule is where travelers get it wrong. Most operators skip acclimatization days because they cost money. This tool designs a schedule that follows Wilderness Medical Society's "sleep altitude gain ≤ 500 m above previous night once above 3,000 m" rule.
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What this solves
Most itineraries describe camps without elevation. Operators give you a number of days, but if you ask "where is the acclimatization day?" the answer is often "we'll figure it out on the trail." That flexibility is where AMS happens. This planner inserts specific acclimatization days at specific altitudes.
How to read the result
- Sleep camp — where you'll actually sleep that night.
- Accl day? — yes means you sleep in the same place, do a "climb high" half-day, return to sleep.
- Diamox — start 24 h before sleeping above 3,500 m. 125 mg morning + evening.
- Red day — mandatory rest day if symptoms. Descend ≥ 500 m.
Limitations
- Trail conditions (snow, landslide) can force camps to be lower or higher than planned.
- Pre-existing conditions shift the rule of thumb. Discuss with a travel doctor.
- Operator itineraries may not allow the flexibility this plan assumes — negotiate the days in advance.
FAQ
How many acclimatization days for Snowman?
At least 3 across the trek — usually between Robluna (4,280 m) and Lhedi (4,100 m), and another at Gangkar Puensum base (4,100 m). Some operators insert an extra between camps 8 and 9.
What's the safest max camp altitude for first-timers?
Below 4,200 m. Druk Path, Gangtey Nature, and Bumthang Cultural all fit. Jomolhari and above should not be a first high-altitude experience.
Sources
- Wilderness Medical Society — AMS Prevention Guidelines 2024
- CDC Travelers' Health — Altitude Illness
- International Society for Mountain Medicine (Lake Louise)