Everyone learns the list of what to bring. Almost no one learns how to put it inside the backpack — and it's that second part that separates a pleasant hike from a whole afternoon with the strap cutting into your shoulder and the backpack pulling you backward on every climb.
The good news: packing a backpack is not a gift, it's technique. There are three decisions that always repeat — how much weight can go in, where each thing goes, and how to protect everything from the rain. Get all three right and the backpack disappears on your back. Get one wrong and you feel it all day.
This guide combines what the Hiking and Backpacking honor of the South American Division (SAD) teaches with the health guidance from the Brazilian Society of Pediatrics (SBP) and field technique used on the trail. Data verified on 07/23/2026 from the sources listed at the end. Nothing here replaces your counselor's guidance or a medical evaluation of a spine problem.
How much weight can the backpack carry?
Before deciding where each thing goes, decide how much can go in. Poorly calculated weight can't be fixed with good packing — only with a lighter backpack.
Here it helps to separate three references that tend to get mixed up and cause confusion:
1) What the Pathfinder honor uses. The material of the Hiking and Backpacking honor works with the idea that the backpack's weight stays around 10% of the body weight of whoever carries it. A 40 kg child would carry about 4 kg; someone of 60 kg, about 6 kg. It's a conservative reference, meant for hiking, and works very well as a starting point.
2) What health recommends. The Brazilian Society of Pediatrics adopts the same parameter for any type of backpack for a child and teenager: do not exceed 10% of body weight. The honor's own material notes that, among researchers, this ceiling ranges from 7% to 20% and there is greater consensus around 10% — which is why the practical range of 10% to 15% is acceptable, but 10% is the safest number, especially for the youngest. A load above that, repeated, is linked to back pain and overload of the growing spine — that's why the caution is not fussiness.
3) The famous "up to 1/3 of your weight." You'll hear that a person can carry up to a third (about 33%) of their own weight. That exists, but it's a ceiling for a trained adult on a long expedition, when there's no way to divide the load — it's not a target, and it's definitely not a number for the age of a Pathfinder. Treating 1/3 as a goal is the shortest path to hurting a young person. For the club's public, the practical range is 10% to 15%, and that's it.
| Person's weight | Safe target (10%) | Maximum limit (15%) |
|---|---|---|
| 30 kg | 3 kg | 4.5 kg |
| 40 kg | 4 kg | 6 kg |
| 50 kg | 5 kg | 7.5 kg |
| 60 kg | 6 kg | 9 kg |
If the total runs over, the solution isn't to tighten the hip belt more — it's to take things out or divide the load across the unit. The tent, pot, and team food can be split up: one carries the tent, another carries the poles, another the stove. Group weight is meant to be carried as a group.
Why does the weight have to stay against your back?
Grab two full water bottles. Hold one against your chest and the other with your arm stretched out in front. The second one feels much heavier — and it's the same weight. That's the center of gravity, and it's the key to everything.
The farther from your back the weight is, the more it pulls you backward and the more force your shoulders and lower back have to make to compensate. The closer it is to your spine and aligned with your own center of gravity, the more the backpack "becomes part of you" and the weight goes straight down to your hips — which are strong and built to bear load.
Hence the rule that guides the whole setup: the heaviest goes as close as possible to your back, at the height between the shoulders and the shoulder blades. Not at the bottom (pulls down), not high and far out (throws you off balance), not at the front of the backpack away from your body. Against the spine, in the upper half.
There's a fine adjustment depending on the terrain. On a common trail — flat or steady uphill — the weight can stay a little higher, at shoulder height; this keeps you upright and is more efficient for walking. On very steep, technical, or slippery terrain, it's worth lowering that center of mass a bit, to gain balance and not get "pushed" in your movements. For the Pathfinder, when in doubt: the heavy stuff against your back, at shoulder height.
What are the three zones of the backpack?
The simplest way to get the distribution right is to think of the backpack in three floors. Each has a function, and you pack from the bottom up.
Bottom — light and bulky zone. It's the first to go in and the last to come out, so it holds what you'll only use at the set-up campsite: the sleeping bag and extra clothes. They're large but light. They form a soft base and have no weight to throw off your balance down there.
Middle, against your back — heavy zone. Here goes what really weighs: food, stove, the refill or the large water bottle, whatever part of the tent fits, cans, and metal objects. Push all of it against the wall of the backpack that sits against your spine, at shoulder height. It's the heart of the center of gravity. The space left on the outer side (farther from your back) takes medium and light items, such as rolled-up clothes, which also act as padding so the weight doesn't shift around.
Top and pockets — quick-access zone. What you might need without stopping to unpack the backpack: rain jacket, snack, first-aid kit, flashlight, sunscreen, map, ID, and the trail water bottle. It goes in the lid, in the external pockets, and in the strap holders. Good rule: if you might need it on the trail, it can't be at the bottom.
| Zone | What goes here | Why |
|---|---|---|
| Bottom | Sleeping bag, extra clothes | Light bulk; only used at the campsite |
| Middle, against your back | Food, stove, water, metal, tent | It's the weight — stays at the center of gravity |
| Middle, outer side | Rolled-up clothes, medium items | They pad the weight and balance the sides |
| Top and pockets | Rain jacket, snack, first aid, water, flashlight, map | Access without opening the backpack |
A detail many people ignore: left-right balance also counts. Don't throw all the weight on one side. Distribute it evenly to both sides, otherwise the backpack tilts you and one shoulder suffers more than the other.
Read alsoWilderness survival: the basics for PathfindersHow do you keep everything dry in the rain?
Here's the truth that ruins many a camp: almost no backpack is waterproof. Seams, zippers, and the fabric itself let water in. Heavy rain, night dew, a stream crossing — and your sleeping bag turns into a sponge. Sleeping wet in the cold isn't just uncomfortable, it's a risk.
The protection that works is from the inside out, in layers:
Layer 1 — the inner liner (the most important). Before packing anything, line the main compartment with a large, sturdy plastic bag — the so-called pack liner, which can be a reinforced trash bag. You pack everything inside it and then twist or fold the mouth of the bag before closing the backpack. That single layer already solves most of the problems, and it costs almost nothing.
Layer 2 — bags separated by category. Inside the liner, wrap in their own bags what can't get wet under any circumstances: the sleeping bag in one bag, dry clothes in another, electronics and documents in a small, tightly closed bag. That way, even if something gets in, the damage stays contained. As a bonus, this also organizes the backpack and helps you find things.
Layer 3 — the external cover. The rain cover that goes over the outside of the backpack protects the fabric and the external pockets, but on its own it won't hold back heavy rain — water runs down underneath and gets in through your back. It's the third line, not the first. In heavy rain, use all three: liner inside, bags by category, and cover outside.
And don't forget your feet: keeping your hiking footwear dry and well cared for — waterproofing it with wax or its own spray before the trail — prevents blisters, and a blister ends the outing faster than any rain. The honor itself advises choosing waterproof footwear for rainy weather and keeping your feet dry to prevent blisters.
How do you fit the loaded backpack to your body?
A well-packed but poorly fitted backpack still hurts. After closing it, the adjustment has an order — and it's almost always done backward.
Start with the hip belt, not the shoulders. The wide waist of the backpack (hip belt) should rest on the hip bones — the hard part you feel on the sides of your waist. Tighten it there. It's the hips, not the shoulder, that should hold most of the weight. Carrying the backpack on your shoulder all day is a recipe for neck pain.
Only then adjust the shoulder straps. They should merely "hug" the contour of your body and keep the backpack against your back — without holding the weight and without slack that leaves the backpack swaying behind you.
Fasten the chest strap and the stabilizer straps. The strap that closes across the front of your chest keeps the straps from slipping to the sides. The thin straps that connect the top of the straps to the body of the backpack pull the load closer to your back — give them a tug and feel the weight "stick" to you.
Simple test before setting off: with the backpack closed on your back, jump once in place. If nothing sways and the weight is on your hips, it's ready. If the backpack jumps after you do, it needs tightening.
Which mistakes ruin the hike?
Some stumbles show up on every first excursion. Knowing the list spares many people's shoulders.
- Weight at the bottom. Heavy things down there pull the backpack backward and down. Heavy goes in the middle, against your back.
- Leaving the essentials at the bottom. Rain jacket buried under everything, first-aid kit in the last corner — right when you need it, you unpack the whole backpack at the edge of the trail. Quick access goes on top.
- Filling beyond the weight. "Just one more little thing" repeated ten times blows past the 10% to 15% limit. If it doesn't fit within the weight, it doesn't fit in the backpack.
- Tying everything on the outside. Pot dangling, sandal swinging, sleeping bag strapped to the back: it snags on branches, throws you off balance, and gets wet. Whatever can go inside, goes inside.
- Relying only on the external cover. Without a liner inside, the first rain soaks the sleeping bag. Protection starts inside the backpack.
- Tightening the shoulder instead of the hips. The neck pain at the end of the day is almost always a loose hip belt and an over-tightened strap.
None of these mistakes is serious on its own. Together, they turn eight kilometers of trail into regret. And they're all solved before leaving home, with the backpack on the living-room floor and time to pack calmly — never in a rush at the meeting point.
Is there a correct order to pack it?
There is, and following the sequence saves you from redoing everything. Always pack in the same order, and after a few times it becomes automatic.
- Sort and weigh everything that's going. Check it against the 10% to 15% limit of your weight before putting it away.
- Line the backpack on the inside with the large plastic bag.
- Bottom: sleeping bag and extra clothes, each in its own bag.
- Middle, against your back: food, water, stove, and whatever is heavy, against the spine wall.
- Sides and empty spaces: rolled-up clothes padding the weight, balancing both sides.
- Close the liner by twisting the mouth of the plastic bag.
- Top and pockets: rain jacket, first aid, snack, flashlight, map, trail water.
- External cover within reach, to put over the backpack at the first sign of rain.
- Put it on, adjust the hips first, then the shoulders, and do the jump test.
It's worth packing the backpack once at home, a few days before, and walking ten minutes with it around the block. It's in that rehearsal that you discover what's excess, what bothers you, and what was missing — with time to fix it, and not in the middle of the woods.