The high alpine is the most rewarding and most punishing American camping environment. Above 9,000 feet, the air is thin, the sun is unfiltered, and weather changes faster than at any elevation in the lower 48. Here's what to pack for a 3-day high-alpine trip in the Sierras, Rockies, Cascades, or Tetons.
Shelter for wind and weather
- 3-season backpacking tent with strong pole structure (single-walled or double-walled, but not ultralight tarp tents — alpine wind eats them)
- 4 extra stakes for the rainfly guylines
- Footprint or polycro groundsheet (granite is rough on tent floors)
- Tent stakes that work in granite cracks (MSR Groundhogs, not the standard wire ones)
Sleep system rated for the worst night
- 20°F sleeping bag at minimum — even in July, Sierra alpine nights can drop to 28°F
- R-value 4+ inflatable pad. Closed-cell foam pad as backup (also useful as a sit pad)
- Lightweight liner adds 10°F
- Sleep with a hot water bottle inside the bag for cold nights
Layering for sun-and-cold
Alpine sun is brutal — UV is 50% stronger at 10,000 feet than sea level — but the air temperature can be 35°F. Layer:
- Sun hoodie (UPF 50, lightweight)
- Long pants (sun and brush)
- Insulating fleece or light synthetic puffy
- Heavier puffy (down or synthetic) for camp evenings
- Hard-shell rain jacket (afternoon thunderstorms)
- Rain pants (not optional)
- Light wool gloves + heavier gloves for evenings
- Beanie + sun hat
Hydration at altitude
Altitude dehydrates you 30% faster. Drink 4-5 liters per day even when you don't feel thirsty.
- 3-liter hydration bladder
- 1-liter bottle for electrolytes
- Filter (Sawyer or BeFree) — alpine creeks are everywhere but should still be treated
- Aquamira drops as backup
Sun protection (more than you think)
- SPF 50 sunscreen (apply 3x/day at altitude)
- Lip balm with SPF
- Sunglasses — ideally glacier-rated (side shields) if you'll be on snow
- Brimmed hat or sun hoodie hood
Cook system
- Canister stove + windscreen (alpine wind is constant)
- 2-liter pot — boil water for tea, soup, and dinner. Hot food calories are critical at altitude.
- Bear canister required in Sierra Nevada parks (Yosemite/Sequoia/Kings Canyon backcountry)
Trekking poles
Not optional. Saves your knees on the descent, helps your balance on scree, gives you a third leg on stream crossings.
Navigation + safety
- Topo map + compass (cell signal essentially zero in most alpine country)
- GPS app with offline maps as backup
- Headlamp with extra batteries
- Personal Locator Beacon (PLB) or Garmin inReach for satellite SOS
- First-aid kit emphasizing altitude sickness, hypothermia, and mechanical injuries from talus/scree
Alpine weather is the wildest variable. Pack for what you'd hate to wake up without.
What about altitude sickness?
Above 8,000 feet, give yourself a day to acclimatize before pushing higher. Symptoms (headache, nausea, shortness of breath) mean go down, not up. Drink heavily, sleep low, climb high during the day.
Alpine-ready packs: shop the kit. For relevant destinations: Yosemite, Rocky Mountain, Glacier, Grand Teton.