Complete guide to acclimatizing in Cusco and avoiding altitude sickness
How many days you need, what to eat, what to avoid and which tours to do first so altitude doesn’t ruin your trip.
The essentials in 30 seconds
- Cusco is at 3,399 m: rest on day one.
- Start with the Sacred Valley, which is lower.
- Hydrate and avoid alcohol for 48 hours.
- For long treks, acclimatize 2–3 days.
Cusco sits at 3,399 m above sea level and many routes go above 4,000 m. Most travelers feel some effect of altitude in the first days. The good news: with a simple plan you can enjoy your trip without trouble.
What is soroche?
It is the local name for acute mountain sickness. The most common symptoms are headache, fatigue, loss of appetite, nausea and trouble sleeping. They usually appear 6 to 12 hours after arrival and ease as your body adapts.
How many days do I need?
- For city tours or the Sacred Valley: 1 rest day.
- For Humantay or Rainbow Mountain: at least 2 days.
- For Salkantay or the Inca Trail: 2 to 3 days.
Ideal plan for your first days
- Day 1: arrive, rest and take a gentle walk around the historic center. Light dinner.
- Day 2: Sacred Valley or Maras-Moray tour, which are lower than Cusco.
- Day 3: Humantay Lake as an altitude test before your trek.
Do’s and don’ts
- Drink 2 to 3 liters of water a day.
- Eat carbs and avoid heavy meals at night.
- Avoid alcohol and tobacco for the first 48 hours.
- Try coca tea in moderation.
- Go slowly — “grandpa pace”, as our guides say.
What about medication?
Some travelers take preventive altitude medication. Always consult your doctor before traveling; do not self-medicate.
Frequently asked questions
01Does coca tea work?
It helps with mild symptoms but does not replace gradual acclimatization.
02Can I go straight to Machu Picchu on arrival?
Yes: Machu Picchu is at 2,430 m, lower than Cusco, so it is a good option for your first days.
