How much should my packed pack weigh?

No more than 20% of your body weight, including water. For a 150-pound person, that's 30 pounds maximum. Ultralight trekkers aim for 15% or less.

Do I really need glacier glasses?

Yes, if there's any snow or glacier exposure. Snow reflects 85% of UV rays, causing snow blindness. Regular sunglasses only block category 2-3 light; you need category 4 for high altitude.

Can I use a 3-season sleeping bag?

Only if nighttime temps stay above 20°F. Mountain weather changes fast. A bag rated 20°F below expected lows gives you safety margin when storms hit.

How many layers should I wear while hiking?

Start with just your base layer and add the minimum needed. You should feel slightly cold when you start hiking. Overheating causes more problems than being briefly cold.

How to Pack for High-Altitude Trekking

Pack in layers focusing on moisture-wicking base layers, insulating mid-layers, and waterproof outer shells. Prioritize items that work in temperatures from 80°F to -10°F and altitudes above 8,000 feet. Your pack should weigh no more than 20% of your body weight.

Choose your base layers. Pack 2-3 merino wool or synthetic base layer sets. Avoid cotton completely. Bring one lightweight set for warm days and one midweight set for cold conditions. Include moisture-wicking underwear and wool hiking socks (bring 4-5 pairs total).
Add insulating layers. Pack a fleece or synthetic insulation jacket for active warmth and a down jacket rated to 15°F below your expected minimum temperature. A lightweight down vest works for shoulder seasons. Bring insulated pants if trekking above 12,000 feet.
Select your shell layers. Pack a waterproof/breathable jacket with full zips and pit vents. Include waterproof pants, not just rain pants. Choose gear rated for at least 10,000mm water column and 10,000g/m²/24hr breathability.
Pack altitude-specific gear. Bring a warm hat that covers your ears, sun hat with neck protection, glacier glasses (category 4), regular sunglasses, SPF 50+ sunscreen, and lip balm with SPF. Pack altitude sickness medication if recommended by your doctor.
Choose appropriate footwear. Pack broken-in hiking boots rated for your terrain. Bring camp shoes (lightweight sandals or insulated booties). Include gaiters if trekking through snow. Microspikes or crampons may be needed above 14,000 feet depending on season.
Add sleep system components. Pack a sleeping bag rated 20°F below expected nighttime lows. Bring a closed-cell foam pad plus an inflatable pad with R-value of at least 4 for insulation from cold ground. Include a pillow or inflatable pillow.

How much should my packed pack weigh?: No more than 20% of your body weight, including water. For a 150-pound person, that's 30 pounds maximum. Ultralight trekkers aim for 15% or less.
Do I really need glacier glasses?: Yes, if there's any snow or glacier exposure. Snow reflects 85% of UV rays, causing snow blindness. Regular sunglasses only block category 2-3 light; you need category 4 for high altitude.
Can I use a 3-season sleeping bag?: Only if nighttime temps stay above 20°F. Mountain weather changes fast. A bag rated 20°F below expected lows gives you safety margin when storms hit.
How many layers should I wear while hiking?: Start with just your base layer and add the minimum needed. You should feel slightly cold when you start hiking. Overheating causes more problems than being briefly cold.