The Ultimate Wilderness First Aid Kit Checklist (From a WFA Instructor)

Most first aid kit lists on the internet are written by gear reviewers and affiliate marketers. They’ll tell you to buy a pre-made kit off Amazon, toss it in your pack, and hope for the best. Here’s the problem: a first aid kit you don’t understand is just dead weight.

I’ve been teaching Wilderness First Aid for over a decade. I’ve taught hundreds of students — backcountry guides, thru-hikers, scout leaders, ski patrollers, and parents who just want to keep their families safe on trail. Every one of them asks the same question: What should I actually carry?

The answer depends on three things: where you’re going, how long you’ll be out, and what you’re trained to do. A day hiker in the Catskills doesn’t need the same kit as a guide leading a 10-day trip in the Sierra. But every kit shares the same foundation — a set of core supplies built around the injuries and illnesses you’re most likely to encounter in the backcountry.

This guide walks through every item in that foundation. Not just what to carry, but why it’s there and how you’ll use it when something goes wrong. If you want the printable version, grab the free downloadable checklist PDF — it covers three complete kit builds (personal day hike, personal multi-day, and group/expedition).

Wound Care & Soft Tissue Supplies

Lacerations, abrasions, and puncture wounds are among the most common backcountry injuries. A stumble on scree, a slip with a camp knife, a branch to the shin — you’ll use wound care supplies more than anything else in your kit.

Irrigation syringe (18-20cc). This is the single most important wound care item you carry, and the one most pre-made kits leave out. Proper wound cleaning requires pressure irrigation — not dabbing with an alcohol wipe. You need a directed stream of clean water forced into the wound to flush out debris, dirt, and bacteria. An 18cc syringe with a thin tip generates roughly 8 psi, which is the threshold for effective wound irrigation. Without it, you’re leaving contamination in the wound and dramatically increasing infection risk.

Gauze pads (4x4, non-sterile is fine). You need gauze for direct pressure on bleeding wounds and for covering cleaned wounds. Carry at least six pads for a personal kit, more for group kits. Non-sterile gauze is acceptable for most backcountry wound care — the irrigation is what prevents infection, not sterile packaging.

Non-adherent wound dressings. These go directly against the wound bed after cleaning. Regular gauze sticks to raw tissue and rips the wound open when you change the dressing. Non-adherent pads (Telfa or similar) prevent this and keep the healing surface intact.

Medical tape (1” cloth tape). You’ll use more tape than you think. It secures dressings, reinforces bandages, closes small wounds in a pinch, and can even stabilize a splint. Cloth tape adheres in wet and cold conditions better than paper tape. Carry a full roll.

Wound closure strips (Steri-Strips). For clean, linear lacerations that you’ve properly irrigated, closure strips can hold wound edges together and reduce scarring. They’re not a replacement for sutures, but in the backcountry, they’re often all you have — and they work remarkably well on clean cuts.

Nitrile gloves (2-3 pairs). Blood-borne pathogen protection. Always glove up before treating a wound, even on your hiking partner. Double-gloving is smart practice when dealing with significant bleeding.

Antibiotic ointment (single-use packets). Apply a thin layer to cleaned wounds before dressing. Bacitracin or triple antibiotic ointment reduces infection rates in minor wounds. Single-use packets weigh nothing and prevent cross-contamination between uses.

For a deeper dive on wound assessment and cleaning protocols, see our guide on wound care in the backcountry.

Orthopedic & Splinting Supplies

Fractures, sprains, and dislocations are the injuries most likely to end your trip. The goal of backcountry splinting isn’t to “fix” anything — it’s to stabilize the injury, reduce pain, and make evacuation possible.

SAM splint. A single SAM splint is the most versatile orthopedic tool you can carry. It’s a thin sheet of aluminum with a foam coating that can be molded to splint a wrist, ankle, finger, or forearm. The key principle: a curved SAM splint is rigid, a flat one is floppy. Create a C-curve or reverse-C along the length and it becomes a structural beam. Pair it with padding and secure it with an elastic bandage or tape.

Elastic bandage (3” or 4” ACE-style). Serves triple duty: securing splints, compression wrapping sprains, and pressure dressing for wound control. One elastic bandage goes a long way.

Triangular bandage (cravat). The Swiss Army knife of backcountry first aid. A triangular bandage becomes a sling for arm/shoulder injuries, a swath to secure a sling against the body, a pressure bandage, padding material, or an improvised tourniquet. Carry at least two.

Athletic tape or co-wrap. Reinforces splints, secures padding, tapes ankles for stability on rough terrain, and serves as a secondary attachment for slings. Co-wrap (self-adherent bandage) is lighter and won’t rip body hair off during removal.

The reality is that you can improvise splints from gear you’re already carrying — trekking poles, sleeping pad foam, stuff sacks packed with clothing. What matters more than fancy equipment is understanding how to splint properly: immobilize the joint above and below the fracture, pad bony prominences, and check circulation below the splint (pulse, sensation, movement) every 15-30 minutes. For step-by-step splinting techniques, see our fracture and splinting guide.

Blister & Foot Care

Blisters won’t kill you, but they’ll end your trip faster than almost anything else. And unlike most wilderness injuries, blisters are almost entirely preventable — if you catch them early.

Moleskin. The classic blister prevention and treatment material. Cut a donut shape around a hot spot or early blister to relieve pressure on the affected area. The raised ring protects the irritated skin while you keep hiking.

Blister-specific bandages (Compeed or similar). Hydrocolloid blister bandages are a step above moleskin for existing blisters. They cushion, protect, and create a moist healing environment. Once applied, leave them in place until they fall off on their own — peeling them early reopens the wound.

Alcohol wipes and needle. For blisters that are already large, tense, and painful, drainage is sometimes necessary. Clean the area with an alcohol wipe, sterilize a needle with flame or alcohol, puncture the blister at the base, press the fluid out gently, and cover with a blister bandage. Never remove the roof of the blister — that dead skin is the best wound dressing you have.

Tincture of benzoin. This sticky adhesive applied to skin before tape or moleskin makes everything stick better, especially on sweaty feet. A small bottle lasts for dozens of applications.

For the full prevention-to-treatment protocol, check out our complete guide to blisters on the trail.

Environmental Protection

The backcountry exposes you to environmental hazards that don’t exist in town — extreme cold, extreme heat, venomous creatures, disease-carrying insects. Your kit needs a layer of environmental protection built in.

Emergency blanket (mylar space blanket). A hypothermic patient loses heat through four mechanisms: radiation, convection, conduction, and evaporation. An emergency blanket addresses radiation — the biggest heat loss mechanism — by reflecting body heat back toward the patient. It also blocks wind (convection) and provides a vapor barrier (evaporation). At 2 ounces, there’s no excuse not to carry one. For a deep dive on heat loss and rewarming protocols, see our hypothermia treatment guide.

Chemical heat packs (2-4 per kit). Place in armpits and groin for active rewarming of hypothermic patients. These target the areas where major blood vessels run closest to the skin surface. Never place directly against skin — wrap in a bandana or sock first to prevent burns.

Sunscreen (small tube, SPF 30+). Sunburn at altitude is no joke. UV intensity increases roughly 10-15% per 1,000 meters of elevation gain. A serious sunburn compromises your skin’s ability to thermoregulate and makes every other environmental challenge harder. See our heat illness guide for more on managing heat-related conditions.

Insect repellent (DEET or Picaridin wipes). Mosquitoes, ticks, and black flies transmit Lyme disease, Rocky Mountain spotted fever, West Nile virus, and more. DEET (25-30%) or Picaridin (20%) applied to exposed skin is still the gold standard for bite prevention.

Tick removal tool (fine-tipped tweezers). When prevention fails, you need to remove attached ticks properly. Grasp the tick as close to the skin surface as possible and pull straight out with steady, even pressure. No twisting, no petroleum jelly, no matches — those folk remedies increase the risk of the tick regurgitating pathogens into the wound. See our tick bite identification and removal guide for the full protocol.

A note on snake bites: Do not carry a suction device, venom extractor, or tourniquet for snake bites. These devices don’t work and can cause additional tissue damage. The correct field treatment for a venomous snake bite is to keep the patient calm, immobilize the bitten extremity, and evacuate immediately. Read more in our snake bite guide.

Medications

Carrying the right medications extends your ability to manage pain, allergic reactions, and GI issues in the field. Every medication below is available over the counter except epinephrine.

Ibuprofen (Advil). Anti-inflammatory and pain reliever. The go-to for musculoskeletal injuries — sprains, strains, fractures. Reduces inflammation at the injury site, which both eases pain and limits swelling. Standard backcountry dose: 400-600mg every 6-8 hours with food. Avoid in patients with kidney issues, stomach ulcers, or significant bleeding.

Acetaminophen (Tylenol). Pain reliever and fever reducer. Use when ibuprofen is contraindicated (stomach issues, bleeding risk) or alternate with ibuprofen for more effective pain management. Unlike ibuprofen, acetaminophen has no anti-inflammatory effect. Standard dose: 500-1000mg every 6 hours. Maximum daily dose: 3000mg.

Diphenhydramine (Benadryl). Antihistamine for allergic reactions — hives, itching, mild swelling from insect stings or plant contact. Also useful as a mild sleep aid. Causes drowsiness, so inform the patient before dosing. For severe allergic reactions progressing to anaphylaxis, diphenhydramine is a supplement to epinephrine, not a replacement.

Aspirin (low-dose, 81mg chewable). Carry this specifically for suspected cardiac events. If a patient presents with crushing chest pain, jaw pain, or left arm pain in the backcountry, have them chew (not swallow) an aspirin immediately. Chewing delivers the drug into the bloodstream faster. This is a potentially life-saving intervention that anyone can perform.

Antacid tablets. Quick relief for the nausea and stomach issues that plague backcountry travelers. Also helps differentiate cardiac-related chest pain from GI distress — if antacids relieve the pain, it’s more likely GI.

Loperamide (Imodium). Anti-diarrheal. In the backcountry, diarrhea creates a dangerous dehydration cascade. Loperamide slows gut motility and buys you time to rehydrate and evacuate if needed. Use cautiously — diarrhea from food poisoning is the body’s attempt to expel the pathogen, so loperamide is best reserved for situations where you need to move.

Epinephrine auto-injector (if prescribed). If anyone in your group has a known severe allergy, an EpiPen is non-negotiable. It’s the only field treatment for anaphylaxis that buys enough time to get to definitive care. Make sure the carrier knows how to use it and that at least one other group member knows where it’s stored and how to administer it.

Assessment & Documentation Tools

These aren’t dramatic, but they’re what separates a panicked response from a competent one. Assessment tools help you gather the information that rescue teams and ER doctors need.

Pen and waterproof notepad. When you assess a patient using the OPQRST and SAMPLE frameworks, you need to write it down. Vital signs change over time, and tracking those trends is how you determine if a patient is improving or deteriorating. A written record also gives rescue teams critical handoff information. “Her pulse was 88 at 2pm and 110 at 3pm” is infinitely more useful than “she seemed worse.”

Watch with a second hand (or digital timer). You cannot accurately measure a pulse or respiratory rate without tracking time. Count pulse beats for 15 seconds and multiply by four. Count breaths for 30 seconds and multiply by two. Your phone works if it’s charged, but a watch is more reliable.

Headlamp. Emergencies don’t wait for daylight. A headlamp frees both hands for patient care and lets you assess pupils (shine the light in one eye, watch both pupils for reaction — they should constrict equally and briskly). It’s also a signaling device in search and rescue situations.

Emergency whistle. Three blasts on a whistle is the universal distress signal. Sound carries farther than shouting and requires almost no energy to produce. Attach one to your pack strap so it’s always accessible.

Customizing Your Kit by Trip Type

Day hike (personal kit, <1 lb). Carry the basics: wound care supplies, blister care, medications, an emergency blanket, and assessment tools. Use a small ziplock or ultralight dry bag. You probably won’t need splinting materials for a 4-hour day hike on a well-maintained trail — but if you’re going off-trail or scrambling, add a SAM splint and elastic bandage.

Multi-day backpacking (personal kit, 1-2 lbs). Everything in the day hike kit plus full splinting supplies, additional gauze and tape, extra medications, chemical heat packs, and more nitrile gloves. On multi-day trips, you’re hours or days from a trailhead — your kit needs to sustain treatment over time, not just stabilize for a quick walk out.

Group / expedition (leader kit, 2-4 lbs). A group leader kit scales for 6-12 people and multi-day scenarios. Add: additional SAM splints, larger quantities of gauze and bandaging, a full range of OTC medications in higher quantities, an emergency bivvy (heavier than a space blanket but far more functional for extended patient care), CPR pocket mask, and written protocol cards for common emergencies. If anyone in the group carries prescribed epinephrine, document it and make sure multiple people know the plan.

Altitude add-on. If your trip goes above 8,000 feet, consider adding: acetazolamide (Diamox, if prescribed), dexamethasone (for severe altitude illness, if prescribed), pulse oximeter, and additional headache medications. Altitude sickness is progressive — early recognition and descent are the primary treatments.

Get the Printable Checklist

We built a free downloadable PDF that covers all three kit levels — personal day hike, personal multi-day, and group/expedition — organized as a packing checklist you can print and use at home before every trip. It includes the specific quantities for each kit level and notes on when to upgrade your supplies.

Download the Free Wilderness First Aid Kit Checklist PDF →

A Kit Without Training Is Just a Bag of Stuff

Here’s the uncomfortable truth: carrying a first aid kit doesn’t make you prepared. Knowing how to use it does.

An irrigation syringe is useless if you don’t know wound cleaning protocol. A SAM splint is dead weight if you can’t assess a fracture. Epinephrine saves lives — but only if someone in the group recognizes anaphylaxis and knows the injection site.

Every item in the checklist above maps directly to a skill taught in our Wilderness First Aid course. The course is completely free, built by the same instructors who train backcountry guides and search and rescue teams, and available online at your own pace.

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Related Reading:

• OPQRST & SAMPLE: The Patient Assessment Frameworks Every Hiker Should Know
• Backcountry Stomach Illness: Nausea, Diarrhea & Vomiting on the Trail