What's the biggest packing mistake people make for the Andes?

Underestimating the temperature swing. It can be 70°F at noon and 30°F at night at the same location. Pack as if you're going to two different climates.

Can I buy gear in Andes cities instead of packing it?

Yes in major cities like Cusco, La Paz, and Quito, but quality varies and prices are often higher than home. Buy small items locally, but bring your critical layers and boots.

How much water should I carry for high-altitude hiking?

4-5 liters minimum per day above 10,000 feet. Dehydration happens faster at altitude. Bring water purification tablets or a filter - stream water isn't safe to drink untreated.

Do I need special boots for the Andes?

Depends on your route. Day hikes need sturdy hiking boots. Multi-day treks need boots that can handle snow and ice. Technical climbs require mountaineering boots with crampon compatibility.

How to Pack for the Andes Mountains

Pack in layers for extreme temperature swings, prioritize altitude-tested gear, and bring essentials for high-altitude conditions. Your base layer, insulation, and waterproof shell are non-negotiable, plus altitude sickness medication and UV protection.

Start with your base layer system. Pack 2-3 merino wool or synthetic base layers. Avoid cotton completely - it kills in cold, wet conditions. Bring lightweight long underwear even for summer trips, as temperatures drop 35-40°F from day to night.
Add insulation layers. Pack a fleece or down jacket as your mid-layer, plus a lightweight down vest you can stuff in your daypack. Down is better for dry conditions, synthetic for wet climates.
Choose your outer shell. Bring a waterproof, breathable jacket with full zip and hood. Gore-Tex or similar technology. Skip the poncho - wind at altitude will turn it into a sail.
Pack altitude-specific items. Bring acetazolamide (Diamox) if your doctor approves, electrolyte tablets, and extra water bottles. Pack lip balm with SPF, high-SPF sunscreen, and glacier glasses or wraparound sunglasses.
Add extremity protection. Pack warm gloves plus liner gloves, a warm hat that covers your ears, and a sun hat with a brim. Bring wool socks - pack 1 extra pair per 2 days of hiking.
Include emergency items. Pack a whistle, headlamp with extra batteries, basic first aid kit, and emergency shelter (space blanket minimum). Add duct tape wrapped around your trekking poles.

What's the biggest packing mistake people make for the Andes?: Underestimating the temperature swing. It can be 70°F at noon and 30°F at night at the same location. Pack as if you're going to two different climates.
Can I buy gear in Andes cities instead of packing it?: Yes in major cities like Cusco, La Paz, and Quito, but quality varies and prices are often higher than home. Buy small items locally, but bring your critical layers and boots.
How much water should I carry for high-altitude hiking?: 4-5 liters minimum per day above 10,000 feet. Dehydration happens faster at altitude. Bring water purification tablets or a filter - stream water isn't safe to drink untreated.
Do I need special boots for the Andes?: Depends on your route. Day hikes need sturdy hiking boots. Multi-day treks need boots that can handle snow and ice. Technical climbs require mountaineering boots with crampon compatibility.