Wilderness First Aid: Essential Skills for Backcountry Emergencies

Wilderness first aid is different from urban first aid in one critical way: help may be hours or days away. You're not stabilizing until the ambulance arrives in 10 minutes. You're treating, monitoring, and potentially evacuating over extended periods.

The Wilderness Context

In an urban setting, your job in an emergency is to call 911 and stabilize the patient for a few minutes. In the wilderness, you may need to:

• Assess and treat injuries with limited supplies
• Make evacuation decisions (self-evacuate vs. send for help)
• Monitor a patient for hours or overnight
• Improvise supplies from what's available
• Navigate with an injured person

Primary Assessment: The ABCDEs

When you encounter an injured person, follow this order:

A — Airway

Is the airway clear? Tilt head back, lift chin, check for obstructions.

B — Breathing

Is the person breathing? Watch for chest rise. If not breathing, begin rescue breathing.

C — Circulation

Is there severe bleeding? Direct pressure on wounds. Check pulse.

D — Disability (Neurological)

Is the person alert? Oriented? Can they move all limbs? Assess level of consciousness using AVPU: Alert, Verbal (responds to voice), Pain (responds to pain), Unresponsive.

E — Environment

Protect from environmental threats: hypothermia, heat, rain, falling hazards. Get the patient insulated from the ground.

The Big Five Wilderness Emergencies

1. Severe Bleeding

• Apply direct pressure with the cleanest available material
• Elevate the wound above the heart if possible
• If direct pressure fails after 10 minutes, apply a tourniquet 2-3 inches above the wound
• Tourniquet rule: Note the time of application; do not remove once applied

2. Hypothermia

Hypothermia kills more outdoor recreationists than any other medical emergency.

Signs: Shivering → confusion → slurred speech → loss of coordination → shivering stops (severe)

Treatment:

• Remove wet clothing
• Insulate from the ground (critical — ground steals heat 25x faster than air)
• Wrap in sleeping bags, emergency blankets, or dry clothing
• Body-to-body warming for severe cases
• Warm, sweet drinks if conscious
• Never rub extremities or apply direct heat to severely hypothermic patients

3. Fractures

Signs: Pain, swelling, deformity, inability to bear weight, crepitus (grinding sensation)

Treatment:

• Splint in the position found (don't try to straighten)
• Immobilize the joint above and below the fracture
• Pad the splint for comfort
• Check circulation below the splint every 30 minutes (pulse, color, sensation)

Improvised splints: Trekking poles, sticks, foam sleeping pads, folded clothing, SAM splints (carry these)

4. Burns

• Cool immediately with clean, cool water for 10-20 minutes
• Cover with moist, sterile dressing
• Do not pop blisters (they're sterile bandages your body made)
• For serious burns: manage pain, prevent hypothermia, and evacuate

5. Allergic Reactions (Anaphylaxis)

Signs: Hives, swelling (especially face/throat), difficulty breathing, rapid pulse, dizziness

Treatment:

• Administer epinephrine auto-injector (EpiPen) if available — thigh injection through clothing
• Position on back with legs elevated (unless difficulty breathing — then sit up)
• This is an immediate evacuation situation

The Wilderness First Aid Kit

Beyond standard first aid supplies, carry:

• SAM splint — moldable aluminum splint
• Elastic wrap bandages — for compression and splinting
• Irrigation syringe — for cleaning wounds with clean water
• Duct tape — improvised bandaging, blister prevention
• Antihistamines (diphenhydramine) — allergic reactions
• Anti-diarrheal (loperamide) — prevents dangerous dehydration
• Moleskin — blister prevention and treatment
• Emergency blanket — hypothermia prevention

Frequently Asked Questions

Should I take a wilderness first aid course?

Absolutely. A hands-on Wilderness First Aid (WFA) course — typically 16 hours over two days — is the single best investment for anyone who spends time outdoors. It provides practical, scenario-based training that reading alone cannot replicate.

When should I evacuate vs. treat in the field?

Evacuate for: suspected spinal injury, severe head injury, chest or abdominal injury, open fractures, signs of internal bleeding, anaphylaxis, severe hypothermia, and any condition that's worsening despite treatment. Treat in the field for: minor wounds, simple fractures that are splinted, mild hypothermia responding to rewarming, and conditions that are stable or improving.

What's the most common wilderness injury?

Blisters and sprains are the most common. They're rarely life-threatening but can be trip-ending and create dangerous situations if they prevent self-evacuation. Prevention (proper footwear, pre-treating hot spots, ankle support) is far more effective than treatment.

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