How do I stay warm while backpacking in cold weather?
Clothing and moisture management
Wear multiple layers: a moisture-wicking base layer (synthetic or wool), an insulating midlayer (fleece or down), and a windproof/waterproof shell. Adjust layers as you hike to avoid sweating, because wet clothing cools you quickly when you stop. Change out of damp base layers before camp.
Keep extremities warm with a hat, gloves, and thick wool socks. Use a balaclava or neck gaiter in wind. Mittens are warmer than gloves. Avoid cotton entirely. If you get wet, change into dry clothes immediately.
- Base layer: wicks sweat, no cotton
- Midlayer: fleece or down for insulation
- Shell: wind and water resistant
- Hat, gloves, warm socks
- Dry clothes in a waterproof stuff sack
Camp and sleep system
Choose a sleeping bag rated for temperatures below what you expect. A sleeping pad with a high R-value (typically 4 or higher for cold weather) insulates you from the cold ground. Use a liner to add warmth. Wear dry layers to bed, but don't overdress or you'll sweat.
Eat a hearty dinner and snack before bed. Your body generates heat digesting food. Stay hydrated, but limit caffeine and alcohol. Use a hot water bottle in your bag. Vent your tent to reduce condensation, which can make your bag damp.
- Sleeping bag rated for expected lows
- Pad with R-value 4+ for cold
- Sleep in dry base layers
- Eat high-calorie dinner
- Vent tent to prevent condensation
Common mistakes
- Wearing too many layers while hiking and sweating, which leads to chilling when you stop.
- Using a sleeping pad with a low R-value, allowing cold from the ground to seep in.
- Drinking alcohol to stay warm, which dilates blood vessels and increases heat loss.
