Building a Backcountry First Aid Kit
A well-built first aid kit addresses the injuries and illnesses most likely to occur in the backcountry. Pre-packaged kits often include unnecessary items while missing critical ones. Building your own kit ensures you carry exactly what you need and, just as importantly, know how to use every item in it.
Kit Philosophy
Your first aid kit should handle the common stuff well: blisters, cuts, sprains, headaches, and GI distress. It should also provide stabilization and pain management for serious injuries while you arrange evacuation.
Do not pack for every possible scenario. An ounce of prevention through good judgment, proper gear, and conservative decision-making prevents more injuries than any first aid kit treats.
Wound Care
Adhesive bandages (6-8): Various sizes for small cuts and blisters. Include butterfly closures or Steri-Strips for closing deeper lacerations.
Gauze pads (2-3) and rolled gauze: For larger wounds that bandages cannot cover. Rolled gauze secures dressings in place.
Medical tape: Holds dressings and wraps in place. Leukotape works as medical tape and blister prevention.
Antiseptic wipes or small bottle of Betadine: Clean wounds before dressing. Infection in the backcountry is a serious complication.
Irrigation syringe: A small syringe provides pressurized water for flushing debris from wounds. This is the most important step in preventing wound infection.
Blister Care
Blisters are the most common trail injury. Your kit should handle them thoroughly.
Leukotape: Applied to hot spots before blisters form. Sticks tenaciously to skin and prevents friction.
Moleskin or Compeed: Cushions and protects existing blisters. Compeed hydrocolloid plasters promote healing.
Needle and alcohol pad: For draining fluid-filled blisters. Clean the needle with alcohol, puncture the edge of the blister, drain, and cover with Compeed.
Musculoskeletal
Elastic bandage (ACE wrap): Wraps sprains, supports injured joints, and provides compression. A versatile item.
Athletic tape: Supports ankles and other joints. Can reinforce an elastic bandage wrap.
SAM Splint (optional, 4 oz): A moldable aluminum splint that can stabilize fractures, sprains, and dislocations. Folds flat for storage. Worth the weight on remote trips.
Medications
Ibuprofen: Anti-inflammatory and pain reliever. Reduces swelling from sprains and relieves headaches. Carry at least 12 tablets.
Acetaminophen: Pain and fever reducer for those who cannot take ibuprofen.
Diphenhydramine (Benadryl): Treats allergic reactions, insect stings, and aids sleep. Can be a first response for anaphylaxis while preparing an epinephrine injector.
Loperamide (Imodium): Stops diarrhea, which is dangerous in the backcountry due to rapid dehydration.
Electrolyte powder: Treats dehydration from illness, heat, or exertion. Individual packets are convenient.
Personal prescriptions: Carry any regular medications plus an epinephrine auto-injector if you have severe allergies.
Tools
Tweezers: Remove splinters, ticks, and cactus spines.
Safety pins (2-3): Secure slings, drain blisters, and serve various improvised purposes.
Small scissors or trauma shears: Cut tape, moleskin, and clothing away from injuries.
Nitrile gloves (2 pairs): Protect yourself and the patient from bloodborne pathogens.
Improvised First Aid
Knowledge is lighter than gear. Learn to improvise.
Trekking poles become splints. Bandanas become slings, tourniquets, and pressure dressings. Duct tape wrapped around a trekking pole provides tape without carrying a full roll. Pack straps and hipbelts immobilize injuries during evacuation.
Kit Organization
Use a clear, waterproof bag or small dry bag for your kit. Organize items by function: wound care together, medications together, blister care together. Know where everything is without searching. For example, the SealLine Black Canyon 115L Dry Bag ($290, 4.6 lbs) is a well-regarded option worth considering.
Label medications with name, dosage, and expiration date. Replace expired items annually.
Training
A first aid kit is only as good as your ability to use it. Take a Wilderness First Aid (WFA) course, which covers backcountry-specific injury and illness management. These 16-hour courses teach wound care, splinting, patient assessment, and evacuation decision-making in contexts where help is hours or days away.
Recommended Gear
Based on the topics covered in this guide, here are some top-rated products to consider:
- Castelli Emergency 2 Rain Jacket - Women's ($105, 4 oz)
- Salomon ADV Skin 5L Race Flag Hydration Pack ($145, 0.4 lbs)
- Patagonia Boulder Fork Rain Jacket - Men's ($229, 0.9 lbs)
- PEARL iZUMi Canyon 2.5L WXB Rain Jacket - Men's ($135, 0.6 lbs)
- Sea To Summit Big River Dry Bag ($50, 5 oz)
- Grayl GEOPRESS Water Purifier ($100, 1.0 lbs)
Conclusion
Build your first aid kit intentionally. Include what you know how to use, what addresses the most common backcountry injuries, and what provides stabilization for serious incidents. Pair your kit with training, and you are prepared for the inevitable minor injuries and the rare serious ones.