Do I really need trekking poles?

Yes. They save your knees on long, steep descents common in the Andes and provide vital stability when crossing rocky scree slopes.

How do I handle the weight limit for pack animals?

Most trekking companies cap weight at 12kg per person. Use a soft-sided duffel bag instead of a hard suitcase, as it's easier for mules or llamas to balance.

Should I bring Diamox?

Consult your doctor before leaving home. Most travelers rely on slow acclimatization—spending 2-3 days in a city like Cusco or La Paz before starting the trek—rather than relying solely on medication.

Packing for High-Altitude Trekking in the Andes

Prioritize a strict layering system and moisture-wicking fabrics, as Andean weather shifts from intense sun to freezing temperatures in minutes. Pack no more than 12kg total in your primary duffel to ensure your porters or pack animals remain within weight limits.

Master the three-layer system. Bring a moisture-wicking base layer (merino wool), an insulating mid-layer (down or synthetic puffy jacket), and a high-quality wind/waterproof shell. Do not bring cotton, as it stays wet and causes rapid heat loss.
Organize with dry bags. Andean weather is unpredictable. Use color-coded dry bags inside your duffel to keep your sleeping bag and dry clothes separate from damp outer layers.
Prepare your footwear. Wear broken-in, waterproof mid-cut hiking boots with ankle support. Bring three pairs of wool-blend hiking socks; change them daily to prevent trench foot.
Manage high-altitude essentials. Pack high-SPF sunscreen (at least SPF 50) and polarized sunglasses. The UV radiation above 4,000 meters is significantly more intense than at sea level.

Do I really need trekking poles?: Yes. They save your knees on long, steep descents common in the Andes and provide vital stability when crossing rocky scree slopes.
How do I handle the weight limit for pack animals?: Most trekking companies cap weight at 12kg per person. Use a soft-sided duffel bag instead of a hard suitcase, as it's easier for mules or llamas to balance.
Should I bring Diamox?: Consult your doctor before leaving home. Most travelers rely on slow acclimatization—spending 2-3 days in a city like Cusco or La Paz before starting the trek—rather than relying solely on medication.