Mountain Trip Packing List

Packing for a mountain trip requires preparation for rapidly changing weather, high sun exposure, and the physical demands of altitude. This guide covers the essential gear you need: a three-layer clothing system, sturdy footwear, sun protection, hydration and snacks, a well-stocked first aid kit, and critical items like a headlamp and daypack. It also explains how to recognize and respond to altitude sickness so you can stay safe on the trail.

Before you start

Before you pack a single item, check the current conditions for your destination. Look up the trail status, road closures, and weather forecast from the land management agency that oversees the area. Many mountain roads close seasonally or require a high-clearance vehicle, so confirm access before you drive. If the trip involves a national park or forest, check whether permits are required for parking or backcountry camping.

Altitude affects everyone differently, and the best preparation is to plan a gradual ascent. CDC guidance for travelers is that once you are above 9,000 feet, you should avoid increasing your sleeping elevation by more than about 1,600 feet per day and add a rest day every three to four days. The core advice is simple: go slowly, stay well hydrated, and listen to your body. Severe symptoms such as confusion, difficulty breathing, or inability to walk in a straight line require immediate descent and medical attention. No amount of gear can replace respecting the altitude.

For more general trip-planning advice, see our Essentials by Destination guide.

The checklist, grouped by category

Clothing: the three-layer system

A layering system lets you adapt to changing temperatures, wind, and precipitation without carrying a bulky wardrobe. The three layers work together: a base layer manages moisture, a mid layer traps warmth, and a waterproof shell protects you from wind and rain.

• Base layer — A long-sleeved top made of wool or synthetic fabric worn next to the skin. It wicks sweat away so you stay dry, which is critical for staying warm at altitude. Avoid cotton, which holds moisture and chills you quickly.
• Mid layer — An insulating fleece, wool sweater, or lightweight puffy jacket. This layer provides warmth that you can add or remove as the temperature changes. On a sunny afternoon you may hike in just your base layer; at a windy summit you will need the mid layer plus the shell.
• Waterproof shell — A jacket that blocks wind and rain while allowing moisture to escape. Look for one that is packable and has a hood that fits over a helmet or hat. Even if the forecast shows clear skies, mountain weather can change in minutes. Mountain trips demand this layer year-round.
• Hiking pants or convertible pants — Choose durable, quick-drying pants that allow a full range of motion. Convertible pants with zip-off legs give you the option of shorts on warm sections and pants when the sun drops or the brush thickens.
• Insulated pants or rain pants — For colder hikes or sustained rain, bring a pair of insulated or waterproof pants to wear over your hiking pants.
• Warm hat and gloves — Pack a beanie or fleece hat and a pair of insulating gloves even in summer. At high elevation, the temperature can drop below freezing any month of the year, and wind chill makes it worse. A lightweight pair of liner gloves can also protect your hands from sun exposure at altitude.
• Sun hat — A wide-brimmed hat or a cap with a neck flap shields your face, ears, and neck from intense high-altitude sun.
• Extra socks — Wool or synthetic hiking socks, at least two pairs. Wet feet lead to blisters and cold, so change into dry socks at camp or after a stream crossing.

Footwear

• Sturdy hiking boots or trail shoes — Choose footwear with good ankle support, a grippy outsole, and enough stiffness for rocky terrain. Break in new boots on shorter walks before a big trip. For routes with loose scree or snow, consider boots that are compatible with strap-on crampons or microspikes.
• Camp shoes or sandals — Lightweight shoes to wear around camp after a day of hiking. They give your feet a chance to breathe and let you cross streams without soaking your boots.
• Gaiters — Optional but useful for keeping snow, scree, and mud out of your boots. If your route includes snowfields or loose talus, gaiters save you from stopping to empty your boots.

Sun protection at altitude

Ultraviolet radiation increases significantly with elevation. Snow and light-colored rock reflect UV rays, so you can burn from below as well as above. Sun protection is not optional.

• Sunscreen — A broad-spectrum sunscreen with a high SPF rating. Apply it to all exposed skin, including your ears, the back of your neck, and the tops of your feet if you wear sandals. Reapply every few hours, especially if you sweat or touch your face.
• Lip balm with SPF — Lips burn easily at altitude and can become painfully chapped.
• Sunglasses — Wraparound or glacier-style sunglasses that block both UVA and UVB rays. Snow blindness is a real risk on snow-covered terrain, so choose lenses with side shields if you will be on glaciers or above the treeline.

Hydration and food

• Water bottles or hydration reservoir — Carry at least one liter of water for every two hours of hiking, and more in hot or dry conditions. A hydration reservoir (bladder) makes it easy to sip frequently without stopping. On long trips, bring a water filter or purification tablets so you can refill from streams or lakes.
• Electrolyte tablets or powder — Adding electrolytes to your water helps replace salts lost through sweat and can reduce the risk of muscle cramps and altitude-related dehydration.
• High-energy snacks — Trail mix, energy bars, nuts, dried fruit, jerky, or chocolate. Pack more than you think you will need; extra food is essential if a storm or injury delays your return.
• Lunch and extra meals — If your trip is a full day or longer, bring a sack lunch and a hot meal option such as a freeze-dried pouch that only requires boiling water.

Daypack and carrying gear

• Daypack — A pack in the range of 20 to 30 liters is sufficient for a full-day hike. Look for one with a hip belt to transfer weight, a hydration sleeve, and external attachment points for trekking poles or an ice axe. For multi-day trips, a larger pack (40 to 60 liters) will be needed to carry camping gear.
• Rain cover for your pack — Even if your pack is water-resistant, a dedicated rain cover keeps your gear dry in a downpour. Alternatively, line the inside of your pack with a heavy-duty trash bag as a waterproof liner.
• Trekking poles — Poles reduce strain on your knees during descents, improve balance on uneven terrain, and can be used to probe for hidden holes or water depth. Many hikers consider them essential for mountain travel.

Navigation and safety

• Map and compass — A topographic map of the area and a reliable compass. Do not rely solely on a phone or GPS device; batteries die, screens break, and signals vanish in remote valleys. Know how to use the map and compass before you go.
• Altimeter watch or GPS device — Helpful for tracking your elevation gain and pace. Some watches also include a barometer that can alert you to approaching storms.
• Headlamp — A headlamp is mandatory on any mountain trip that might extend past sunset. Even a short hike can take longer than expected due to a wrong turn or an injury. Choose a headlamp with a bright beam and a red-light mode to preserve night vision. Mountain trips often start or end in the dark, so keep your headlamp accessible in an outer pocket.
• Whistle — A small plastic whistle attached to your pack strap. Three short blasts is the universal signal for help.
• Fire starter and lighter — In an emergency, the ability to start a fire can be lifesaving. Carry a waterproof container with a lighter or matches and a fire starter tab.

First aid and emergency kit

• First aid kit — A compact kit with adhesive bandages, sterile gauze, medical tape, antiseptic wipes, blister treatment (moleskin or blister pads), pain relievers, antihistamines, and any personal medications. Include a small roll of elastic bandage for sprains.
• Blister care — Moleskin, blister-specific bandages, or leukotape. Treat hot spots before they become blisters.
• Emergency blanket or bivy sack — A lightweight reflective blanket or a waterproof bivy sack can keep you alive if you are forced to spend an unplanned night out.
• Multi-tool or knife — Useful for gear repairs, cutting cord, or preparing food.

Other essentials

• Identification and permits — Carry your ID, any required permits, and a printed copy of your itinerary left with a trusted person at home. If you are flying to the trailhead, note that REAL ID enforcement for domestic flights began May 7, 2025; check that your ID meets current requirements. Spare lithium batteries and power banks must be in your carry-on bag, not in checked luggage.
• Power bank and charging cable — For recharging your phone, headlamp, or GPS device. Keep the power bank in your carry-on if flying.
• Trash bag — Pack out all trash, including food scraps and used toilet paper. A dedicated trash bag makes it easy to follow Leave No Trace principles.
• Toilet kit — A trowel, toilet paper, and hand sanitizer. In alpine areas, dig a cathole 6 to 8 inches deep and at least 200 feet from water sources, camps and trails.

What you can skip

Not every item on a general packing list belongs in your pack for a mountain trip. Leave behind anything that adds unnecessary weight or bulk without a clear purpose.

• Cotton clothing — Cotton T-shirts, jeans, and cotton underwear are heavy, slow to dry, and dangerous if they get wet in cold conditions. Stick with wool or synthetics.
• Large towels — A small pack towel or bandana is enough for drying your hands or wiping sweat. A bath towel takes up too much space and weight.
• Heavy cookware — If you are not camping overnight, you do not need a stove, pot, or fuel. For day hikes, a packed lunch and snacks are sufficient. For overnight trips, use a lightweight backpacking stove and a single pot.
• Excessive toiletries — Leave full-size bottles of shampoo, conditioner, and lotion at home. A small tube of biodegradable soap and a travel-size toothpaste are all you need.
• Unnecessary electronics — A smartphone, headlamp, and perhaps a GPS device or altimeter watch are enough. Leave the tablet, portable speaker, and extra camera gear behind unless photography is the main purpose of the trip.

A quick-reference table

FAQ

Do I really need a warm hat and gloves in summer?

Yes. At high elevation, temperatures can drop below freezing even in July, and wind chill can make exposed skin feel much colder. A sudden afternoon thunderstorm can turn a warm hike into a cold, wet one in minutes. A lightweight beanie and a pair of gloves take up almost no space but can make the difference between a comfortable trip and a dangerous one.

How much water should I carry on a mountain hike?

A common guideline is to carry at least one liter of water for every two hours of hiking, but the amount depends on the temperature, the difficulty of the terrain, and your personal sweat rate. In dry or hot conditions, you may need twice that. If water sources are available along the route, bring a filter or purification tablets so you can refill rather than carrying all your water from the start.

What are the signs of altitude sickness and what should I do?

Mild altitude sickness causes headache, nausea, fatigue, and dizziness. If you experience these symptoms, stop ascending, rest, and hydrate. Do not go higher until the symptoms resolve. Severe altitude sickness includes confusion, difficulty breathing even at rest, loss of coordination, or a persistent cough. These are medical emergencies that require immediate descent to a lower elevation and professional medical attention. Never leave a person with severe symptoms alone.

Can I use my phone as my only navigation tool?

You should not rely solely on a phone for navigation in the mountains. Phone batteries drain quickly in cold temperatures, screens can be hard to read in bright sun, and cellular service is often absent in remote areas. A downloaded map app can be a useful backup, but carry a paper topographic map and a compass as your primary navigation tools, and know how to use them before you go.

Packing for a mountain trip is about being prepared for the unexpected. The items on this list help you stay warm, dry, hydrated, and safe no matter what the mountain throws at you. For a different kind of outdoor trip, see our Tropical Vacation Packing List for warm-weather destinations at sea level.