Winter outdoor activities can be good for both body and mind, and winter hiking safety helps you enjoy this season to the fullest. Spending time outside in colder months can boost mood, increase energy, and strengthen social connections. Exposure to natural light, even on cloudy days, supports vitamin D production, which has been linked to maintaining a positive mood. Simple activities like hiking, snowshoeing, or walking with friends can leave you feeling more resilient, refreshed, and less isolated during the darker months. (L.L.Bean Outdoor Discovery Programs)

When you combine those benefits with the quiet beauty of snow-covered forests and crisp air, it’s easy to see why winter hiking is worth the effort. But winter hiking safety is essential, because cold conditions can also increase the risk of hypothermia and other cold-related problems. Understanding how hypothermia develops, how to recognize it early, and how to prevent it is a key part of planning a safe and enjoyable winter hike.

Winter hiking safety and hypothermia

Hypothermia is one of the most serious risks for anyone spending extended time outdoors in cold or wet conditions. The Green Mountain Club provides a description of hypothermia from the Mayo Clinic: hypothermia is a dangerous drop in body temperature that happens when your body loses heat faster than it can generate it. Normal temperature is around 98.6°F (37°C), and hypothermia develops when core temperature falls below 95°F (35°C).

Mass General Brigham notes that while most people associate hypothermia with extreme cold, it can also develop when you are chilled by rain, sweat, or cold water—even at cool temperatures above 40°F. Prolonged exposure to cold, wet, or windy conditions exhausts your body’s energy reserves and gradually lowers your body temperature.

This means winter hiking safety is not just about “how cold the thermometer says it is.” Hypothermia can set in when:

• You are outside longer than expected.
• You are wet from sweat, rain, or snow.
• You don’t eat or drink enough to fuel your body’s “furnace.”

Because hypothermia affects judgment and coordination early on, being able to recognize its stages is especially important.

Signs and symptoms: mild, moderate, and severe hypothermia

Different sources describe hypothermia in stages. For winter hiking safety, it can help to think in terms of three stages: mild, moderate, and severe. The specific signs come from Green Mountain Club, REI, and Washington Trails Association (WTA). The stages are a helpful way to understand how these symptoms progress.

Mild hypothermia

Early signs include “the umbles”: stumbles, mumbles, grumbles, and fumbles—changes in coordination, speech, and mood that show someone is getting too cold. Uncontrollable shivering and bluish lips are also early warning signs.

Common mild signs may include:

• Shivering uncontrollably
• “The umbles”: stumbles (minor lack of coordination); mumbles (perhaps with slurring of words); grumbles (unusually quiet or irritable, personality changes); fumbles (with gear or other objects)
• Lips starting to look blue
• Body temperature that is lower than normal but usually still above 90–92°F

At this stage, winter hiking safety actions can reverse hypothermia if taken promptly.

Moderate hypothermia

As symptoms worsen, a person can move into a moderate stage—bridging from early cues to the severe features described by WTA. Signs may include:

• Strong shivering that over time may become less effective at generating body heat
• Increasing lack of coordination that can include stumbling and falling
• More obvious slow thinking, forgetfulness, confusion, irritability, or poor decision-making

This is the point where winter hiking safety decisions—such as sheltering/insulating, rewarming, and evacuating the hiker—can prevent progression to a life-threatening condition.

Severe hypothermia

For severe hypothermia, critical signs may include:

• Body temperature below 90°F
• Shivering may stop entirely due to energy depletion
• Severe lack of coordination
• Incoherence or inability to respond appropriately
• Possible “paradoxical undressing,” where someone starts taking off clothes despite being dangerously cold
• In extreme cases, unconsciousness with undetectable respiratory rate

In this stage, hypothermia becomes a true medical emergency, and careful handling plus rapid evacuation to professional medical care are essential.

Treating hypothermia on the trail

Winter hiking safety includes knowing what to do if you or someone in your group starts showing signs of hypothermia. The Green Mountain Club, REI, and WTA outline practical, field-friendly steps, especially for mild to moderate cases. The steps below are based on this information:

For mild hypothermia

For early signs, a combination of shelter, dry clothing, calories, and movement may allow the hiker to recover:

1. Get out of exposure.
   Move the person out of wind, rain, or snow if possible—into tree cover, behind terrain features, or into a shelter.
2. Replace wet clothing with dry layers.
   Switch out wet layers for dry ones. Putting dry clothes on top of wet ones is not enough. Even if the person’s bare skin is exposed to the elements briefly, wet garments should be removed and replaced with dry garments so the person’s skin can dry and the cooling/chilling action of the moisture stops.
3. Add insulation.
   An extra middle layer could be added under the insulating jacket (and outer shell, if worn by the person).
4. Fuel the furnace.
   Provide sugary, easily digested snacks and warm drinks. These will provide energy the person needs to shiver and generate body heat. If possible, try to avoid foods and drinks that contain caffeine or alcohol.
5. Encourage gentle movement.
   Encourage short bursts of mild movement or exercise to generate heat—such as walking in place or jumping jacks—while avoiding overexertion and sweating.

These steps can be enough to reverse mild hypothermia if you act quickly. In some circumstances, the person may recover to the point that the hike could be resumed. But careful assessment and judgment would be needed in making the decision to carry on.

For moderate to severe hypothermia

WTA notes that serious hypothermia is a “stop and fix” situation, but cautions that stopping for long in harsh conditions can also put the rest of the group at risk from extended exposure. This is where winter hiking safety relies on balancing immediate treatment with an evacuation plan.

For more advanced hypothermia:

• Handle the person gently. Rapid or extreme movement can trigger or worsen heart rhythm problems in a severely cold person.
• Protect them from the elements. If available, use a temporary shelter such as a small tent, bivy sack, or blanket. Also try adding a dry mid-layer to the person’s changed-out/dry clothing, and if the person is not already wearing them and they are available, try adding a dry insulating jacket and top/bottom shell.
• Continue passive rewarming. Shelter, dry clothing, and added insulation can help the body rewarm itself.
• Seek professional help as soon as possible. In severe cases, immediate evacuation and professional medical care are vital.

Because late-stage complications can be serious, Mass General Brigham recommends first aid and CPR training that matches the intensity and remoteness of your trips.

Why hikers get hypothermia: three common causes

The middle of a winter hike is not the time to discover gaps in your winter hiking safety plan. WTA, along with Green Mountain Club, Mass General Brigham, and REI suggest pathways that can lead to hypothermia. The pathways below are based on this information:

1. Inadequate protection from the elements

• Underestimating how much colder it is at higher elevations
• Not dressing with an appropriate layering system
• Getting soaked from snow, rain, or sweat and lacking extra dry clothes
• Wearing cotton layers that hold moisture instead of wearing wool or synthetics

Cold wind, dropping temperatures, and wet clothing can combine quickly to cool your body.

2. Inadequate hydration and food

Winter hiking burns a lot of calories and uses a lot of water as your body works to maintain a stable temperature. Hikers who do not eat and drink regularly may impair their ability to generate body heat. They also may become tired, clumsy, and more prone to poor decisions such as pushing on when short breaks are needed to “refuel,” rest, and change out of wet clothes—circumstances that can make hypothermia more likely.

3. Inadequate preparation for route and conditions

Winter hiking can offer incredible views but can come with fewer daylight hours, colder surroundings, and often fewer people on trail. If something goes wrong and you are delayed or off-route without the right gear and supplies, the risk of hypothermia can rise quickly.

WTA adds that hypothermia often develops as a secondary problem after a separate issue—like an injury or broken gear—extends your time in the cold (without extra clothing and food).

Preventing hypothermia: key winter hiking safety strategies

The most effective approach to winter hiking safety is prevention. Green Mountain Club, Mass General Brigham, REI, and WTA all point toward a common theme: dress properly, manage moisture, fuel your body, and plan ahead.

Build a smart layering system

Many hikers may think in terms of four functional layers for winter hiking safety:

1. Base Layer (next to skin).
   • Purpose: move sweat away from the skin.
   • Materials: wool or synthetic; cotton should be avoided because it holds water and can make you colder over time.
   • Examples: light wool or synthetic long-sleeve top (with bottom) or long john top/bottom.
2. Middle Layer (warmth management/insulation).
   • Purpose: provide insulation to retain body heat.
   • Examples: synthetic fleece jacket/pants, breathable synthetic hiking pants, or similar pieces that you can easily add or remove.
3. Insulating Layer (extra warmth).
   • Purpose: increase insulation and warmth.
   • Example: a puffy jacket that can go over your middle layer.
4. Outer Shell (weather defense, protection from precipitation and wind).
   • Purpose: block snow, sleet, rain, and wind while still allowing moisture to escape.
   • Examples: waterproof or water-resistant jacket and pants.

Please Note: In our earlier article What to Wear for Fall Hiking in Montana: A Helpful Layering Guide, we included the Insulating Layer as part of the Middle Layer. In this new article, we use the separate Insulating Layer just to distinguish heavier puffy jackets from the lighter fleece jackets that may need to be changed out when damp/soaked with perspiration.

Mass General Brigham adds an important detail for winter hiking safety: clothing should be layered loosely to leave small air gaps between layers. Those pockets of warm air create an insulating barrier. Compressing layers too tightly can cause the layers to conduct heat outwardly and cause you to lose heat faster.

Stay dry: “The key to staying warm is staying dry.”

Sweat, rain, and melting snow can all pull heat rapidly from your body. REI notes that it’s important to add and remove layers throughout your hike so you stay warm without overheating and getting sweaty; getting wet on a cold day can potentially lead to hypothermia. Mass General Brigham similarly warns that overheating and sweating in the cold can cool you quickly, especially if you are wearing cotton that holds/traps moisture.

For winter hiking safety:

• Adjust layers often—unzip or remove a layer when you start to sweat, and add layers as you stop, rest, and begin to chill.
• Swap out damp or soaked base layers with dry ones.
• Use a breathable shell that blocks precipitation and wind but lets moisture escape.

In practice, “The key to staying warm is staying dry.” (Green Mountain Club), and your layering decisions should reflect this idea each time you’re out on the trail.

Eat and drink early and often

Green Mountain Club, Mass General Brigham, REI, and WTA all underscore the importance of hydration and calories: your metabolism is your internal heat source, and it needs fuel.

Useful habits for winter hiking safety include:

• Bring ample and extra water. Mass General Brigham suggests 2–3 liters for a cold-weather day hike, carried in a water bladder close to your body so it doesn’t freeze.
• Drink regularly. Because cold can blunt thirst, keep water in easy reach and sip often instead of waiting to feel thirsty. REI provides an additional recommendation of keeping individual bottles inside your pack or using insulated sleeves to prevent freezing.
• Pack calorie-dense snacks. Chocolate, nuts, trail mix, and cheese are examples of foods that can resist freezing in the cold and provide valuable energy. Frequent snacking can help keep energy and warmth up.
• Keep snacks easy to reach. Mass General Brigham notes that tucking food where you can easily access it makes you more likely to actually eat it.

Rather than saving snacks and drinks “for later,” use them steadily as tools for winter hiking safety.

Take short, purposeful breaks

WTA recommends “good rest management”: pick sheltered spots, keep breaks short, encourage eating and drinking, and avoid long periods of inactivity in the cold. Green Mountain Club adds that in winter, your body has to switch quickly from cooling mode during exertion to warming mode during a stop, which can burn a lot of energy and can make you shiver as soon as you pause.

A practical pattern is:

• Pause in a spot sheltered from precipitation and wind if possible.
• Change out of any damp or soaked layers and replace with dry layers if needed.
• Add an insulating layer for the duration of the break if needed.
• Drink, eat, and briefly check your hands, fingers, feet, and toes for cold-related issues.
• Keep the break short enough to avoid getting chilled before moving again.

This approach supports winter hiking safety by combining rest and recovery with steady warmth.

Plan ahead and carry the right gear

Green Mountain Club and REI both remind hikers that winter conditions bring less daylight, intense cold, and potentially fewer other hikers. That means planning is part of winter hiking safety:

• Know your route, distance, elevation gain, and estimated time to complete the hike. Check the current trail conditions (if available) and check the weather forecast.
• Leave your itinerary with someone, including expected return time.
• Carry a headlamp with fresh lithium batteries (which may perform better in cold than alkaline batteries) and keep them in an inside pocket so they do not deplete as fast as they would when directly exposed to cold.
• Pack according to the “Ten Essentials” for navigation, sun protection, insulation, illumination, first aid supplies, fire, repair kit and tools, food, hydration, and emergency shelter.

Combining good planning with clothing, food, and hydration strategies builds a strong winter hiking safety foundation.

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Lakeside Motel & Resort as your winter hiking “base camp”

After a safe and satisfying day on snow-covered trails, a comfortable place to warm up and refuel makes winter hiking safety easier to maintain from day to day. Lakeside Motel & Resort provides several options that work well as a winter hiking base:

• Motel rooms and cabins. Lakeside offers standard motel rooms as well as cabins, accommodating a wide range of group sizes—from solo hikers to families and small groups.
• Cabins with fully equipped kitchens. Every cabin includes a full kitchen, so you can prepare hot meals, organize trail snacks for the next day, and manage hydration and nutrition just the way you like.
• On-site restaurant. For guests who prefer not to cook after a full day outside, Lakeside’s convenient on-site restaurant can provide breakfast, lunch, and dinner, making it easier to stay well-fed and ready for the next hike.

Having Lakeside Motel & Resort as a comfortable and convenient “base camp” allows you to focus on winter hiking safety—layering properly, staying dry, fueling your body, and planning thoughtful routes—while having a warm, welcoming place to return to between your winter hiking adventures.

Sources:
Apisa, Luke N. (Mass General Brigham). “How to Prevent Hypothermia.” massgeneralbrigham.org. 23 December 2024 (Published). https://www.massgeneralbrigham.org/en/about/newsroom/articles/how-to-prevent-hypothermia.
B., Moe (L.L.Bean Outdoor Discovery Programs). “Winter Wonders: The Surprising Benefits of Winter Outdoor Activities.” llbeanoutdoors.com. 15 January 2025 (Published). https://www.llbeanoutdoors.com/blog/winter-wonders-the-surprising-benefits-of-winter-outdoor-activities.
Knapp, Ken (REI Co-op). “Cold-Weather Hiking Tips.” rei.com. 2 June 2025 (Updated). https://www.rei.com/learn/expert-advice/cold-weather-hiking.html.
Miller, Caitlin (Green Mountain Club). “Winter Hiking Preparedness.” greenmountainclub.org. 8 December 2016 (Published). https://www.greenmountainclub.org/winter-hiking-preparedness/.
Miller, Caitlin (Green Mountain Club). “Winter Hiking Preparedness, Part Deux.” greenmountainclub.org. 15 December 2016 (Published). https://www.greenmountainclub.org/winter-hiking-preparedness-part-deux/.
Milne, Tom (Washington Trails Association). “How to Avoid, Recognize and Treat Hypothermia.” wta.org. 26 November 2025 (Accessed). https://www.wta.org/go-outside/trail-smarts/how-to/how-to-avoid-prevent-and-recognize-hypothermia.