How much water should I carry at altitude?

Carry 3-4 liters per day. Dehydration hits faster at altitude and increased respiration causes more water loss. Drink even when not thirsty.

Can I rent gear in Andean gateway cities?

Yes. Cusco, La Paz, and Huaraz have quality rental shops. Expect $8-15 daily for sleeping bags, $5-10 for jackets. Inspect gear carefully - some items see heavy use.

How do I prevent altitude sickness?

Ascend gradually (no more than 2,000 feet sleeping elevation gain per day above 8,000 feet), stay hydrated, and consider Diamox starting 1-2 days before ascent. Descend immediately if symptoms worsen.

What's the weight limit for porter services?

Most porter services limit personal gear to 15-20 pounds (7-9 kg). They carry group gear separately. Pack only essentials and rent heavy items when possible.

How to Pack for High-Altitude Hiking in the Andes

Pack in layers for extreme temperature swings, bring altitude sickness medication, and prioritize lightweight gear since every ounce feels heavier at elevation. Focus on moisture-wicking base layers, insulated mid-layers, and waterproof outer shells.

Start with moisture-wicking base layers. Pack 2-3 merino wool or synthetic base layer tops and bottoms. Cotton kills at altitude. Merino wool regulates temperature and resists odor during multi-day treks.
Add insulated mid-layers. Bring a down or synthetic insulated jacket plus a fleece or soft-shell layer. Down compresses smaller but loses insulation when wet. Synthetic maintains warmth when damp.
Pack a waterproof outer shell. Bring a breathable, waterproof jacket and pants. Weather changes fast in the Andes. Look for pit zips and leg vents to dump heat during climbs.
Choose proper footwear. Pack waterproof hiking boots broken in for at least 50 miles, plus camp shoes (lightweight sandals or slip-ons). Bring gaiters to keep rocks and snow out of boots.
Include altitude-specific items. Pack acetazolamide (Diamox) for altitude sickness prevention, high-SPF sunscreen, glacier glasses or wraparound sunglasses, and lip balm with SPF. UV exposure increases 10-12% per 1,000 feet of elevation.
Pack for temperature extremes. Bring a warm hat that covers ears, sun hat with brim, insulated gloves, and liner gloves. Pack a sleeping bag rated 10-15°F below expected temperatures.
Add essential gear. Include trekking poles (reduce knee stress on descents), headlamp with extra batteries (cold drains batteries faster), water purification tablets or filter, and electrolyte supplements.

How much water should I carry at altitude?: Carry 3-4 liters per day. Dehydration hits faster at altitude and increased respiration causes more water loss. Drink even when not thirsty.
Can I rent gear in Andean gateway cities?: Yes. Cusco, La Paz, and Huaraz have quality rental shops. Expect $8-15 daily for sleeping bags, $5-10 for jackets. Inspect gear carefully - some items see heavy use.
How do I prevent altitude sickness?: Ascend gradually (no more than 2,000 feet sleeping elevation gain per day above 8,000 feet), stay hydrated, and consider Diamox starting 1-2 days before ascent. Descend immediately if symptoms worsen.
What's the weight limit for porter services?: Most porter services limit personal gear to 15-20 pounds (7-9 kg). They carry group gear separately. Pack only essentials and rent heavy items when possible.