Trail shoes or hiking boots, and what the ankle-support research actually found

Most people walking to Everest Base Camp or round Annapurna are in more boot than the route asks for. That is our honest position after guiding these trails since 1998, and the ankle-support argument usually used to justify the heavier boot turns out to have surprisingly little behind it. There is still a version of this trek where the boot is right, and it is worth knowing which one you are doing before you spend the money.

What the ankle-support research actually found

The reason almost everyone buys a boot is ankle support, and it is the claim with the least evidence behind it. A review of the literature on shoe collar height, published in 2020 by Lai and colleagues, reports that the evidence supporting high-top shoes for preventing ankle sprains has not been fully established, and that from an epidemiological view no significant difference in sprain occurrence has been found between high-top and low-top shoes.

Read that carefully, because it is narrower than the internet version of it. It does not say boots are useless. It says the protective effect people assume is there has not been demonstrated. Some biomechanical work does show a high collar restricting how far the ankle rolls; what has not followed is a matching drop in actual injuries.

And the honest caveat, which most articles quoting this research leave out: those studies are largely on athletes on sports surfaces, not on people carrying a pack down a wet stone staircase at 4,000 m. Our trek is not the study population. So this is a good reason to stop treating ankle support as an automatic argument for a boot. It is not a good reason to declare boots pointless, and anyone telling you the science has settled it is overreading a paper they have not read.

Why the weight on your feet counts double

Here is the argument that gets far less attention and is on much firmer ground. Soule and Goldman measured the energy cost of carrying loads on the head, the hands and the feet, and found that a load carried at the extremities costs more metabolically than the same load carried close to the trunk. Weight on your feet is simply more expensive to move than weight in your pack.

Over a fortnight of six-hour days, that difference is not academic. A pair of stiff leather boots against a pair of trail shoes is a real weight gap, lifted somewhere in the region of twenty thousand times a day. It is one of the few gear choices where the cheap option is also the physiologically easier one.

What we actually see on the trail

The failures we deal with are almost never ankles. They are blisters, and they are toenails lost on the descent, and they are feet that swelled by day six into boots bought in the correct size for a shop on a Saturday afternoon. A boot does not prevent any of those. A shoe that fits, half a size up, with a sock that manages moisture, prevents all three more reliably than a stiffer upper does.

The second thing we see is people who bought a serious boot for a walk that did not need one, and who spend two weeks carrying the extra weight and the extra stiffness for a protective benefit the route never asked them to cash in. If a porter is carrying your duffel and you are walking a lodge trail below 5,000 m, you are that person more often than not.

None of this is an argument for arriving in road-running shoes. A trail shoe has a grippier outsole, a firmer platform and a toe cap, and those matter on loose ground. The distinction that counts is trail shoe against boot, not shoe against boot in general.

What to buy for a teahouse trek

For most people on a lodge trek with a porter, a low trail shoe wide enough to accommodate a fortnight of swelling is the right answer, and it is also the cheaper one.

If you are carrying your own load, crossing a pass with snow on it, or you know your ankles, buy the boot and do not feel talked out of it by a study about athletes. This is the version of the trek where the extra weight buys you something real.

Whichever you pick, do not buy it the week before you fly — we have written separately about why that single decision ruins more trips than weather does, and the same applies to a shoe. And spend the money you saved on socks and a sensible base layer rather than on more footwear.

Where a boot is still clearly the right answer

Snow is the simplest one. A trail shoe has no membrane and no insulation, so an early-morning crossing of a high pass in October leaves you with wet, cold feet for hours, and cold feet at altitude are a genuine safety issue rather than a comfort complaint. If your itinerary crosses Thorong La, Cho La or the Three Passes, take the boot.

Load is the second. Under a heavy pack the foot flattens and the sole flexes, and a soft trail-shoe midsole stops supporting you somewhere in the second week. Our own catalogue note on the low Merrell says exactly this, and it is the reason we do not recommend it to people carrying fifteen kilos themselves.

Previous injury is the third, and it is the one place the evidence genuinely supports intervention — though what the research points to is an ankle brace rather than a boot. If you have sprained the same ankle repeatedly, a brace inside a shoe is better supported than a high collar around it.

Questions we get asked about trekking footwear

Do I need waterproof shoes for Nepal

In the autumn and spring seasons, usually not below the snowline. A membrane keeps water out and also keeps sweat in, and a non-waterproof trail shoe dries in an afternoon while a wet boot stays wet for two days. Above the snow, take the membrane.

Can I wear my running shoes

Road-running shoes have a smooth outsole and a soft, unstable platform on uneven ground. They are the one footwear category we do actively argue against. A trail shoe costs about the same and is built for the surface.

What size should I buy

Half a size up on whatever you would normally take. Feet swell over consecutive walking days at altitude, and a shoe that fits perfectly in the shop is the shoe that costs you toenails on the descent to Lukla.

Should I rent boots in Kathmandu

No. Thamel rents down jackets and sleeping bags well, and we tell people to rent both. Footwear is the exception, because fit is the whole product and you cannot break in a stranger’s boot in a day. This is the one bit of kit to bring from home.

If you are still deciding, the honest shortcut is to look at who is carrying your bag. Our trail shoe picks and boot picks sit in the full gear catalogue, and the routes these get worn on most are the Everest Base Camp and Annapurna Base Camp treks.

Cover photo: Karolina via Pexels (Pexels License).