How to Choose Trail Running Shoes

In trail running, as in any running discipline, shoes sit at the heart of an athlete’s kit. They’re the only piece of gear in direct contact with the ground and that ground is often rough, sometimes downright hostile. Rocks, mud, grass, roots, dust, gravel, asphalt: the variety of surfaces is one of trail’s defining features, and brands try to meet runners’ expectations by both specializing their models and packing in more and more “built-in tech”.

Before getting into the different selection criteria, one thing matters: there is no single perfect, universal pair. Every runner is physiologically different (foot shape, weight, gait…), has their own practice (training frequency, more or less technical terrain, distances…), and their own preferences. A shoe that feels perfect to one person can feel awful to another. Still, to find what suits you best right now (your preferences, your running, and even your feet can change), a few criteria are worth a close look.

Criterion #1: comfort

This is non-negotiable. The worst thing for a runner is sore feet. From the first try-on, you should feel genuinely comfortable in the shoe. That said, there are exceptions: some models can feel stiff at first, or cause a bit of rubbing on the first outings, then break in and become very comfortable. But those are the rare cases you want to identify, ideally through media reviews or feedback from specialty running stores.

Criterion #2: lockdown

One of the key qualities of a trail shoe is how well it holds the foot. Your foot needs some freedom to work properly, but it shouldn’t slide front to back or side to side. On technical terrain, poor lockdown means instability and a lack of confidence, and at worst, a sprained ankle. The fit (width, shape) and the lacing system are what let you dial in that precision. Quicklace® systems from Salomon or Boa® dials can deliver very precise adjustment without loosening over the miles. Good lockdown feels secure, lets you place your feet accurately, and doesn’t crush them.

Criterion #3: traction

This comes from what’s often called grip, in other words the lug pattern (lug depth, shape, and layout). The deeper the lugs, the better they bite in mud, while smaller lugs are generally better suited to dry terrain. You also need to consider how well the outsole sheds mud, because a sole that clogs up stops gripping… and becomes a pretty serious weight to haul around.

Criterion #4: grip on wet ground

This is the key criterion for wet conditions. Wet grip is a sole’s ability to stick to slick surfaces, like a rock polished by rain. It’s hard to test in a store, but reviews in the specialist press can help. If you mostly run on forest paths that aren’t very rocky and don’t get especially slippery, you’re better off prioritizing comfort and traction, not necessarily wet grip.

Criterion #5: protection

Mountain trail running can put you on terrain that’s genuinely punishing. Shoes then need reinforcements to protect your feet. If you run in the mountains regularly, a few areas deserve extra attention:

• A toe bumper up front, often a more or less thick plastic overlay

• Side reinforcements, often made with a protective plastic coating

• A heel counter, usually fairly rigid

• The sole unit: its thickness and cushioning determine how much the ground is filtered

Without turning into a bulldozer, a trail shoe should let you scramble through a scree field without fearing for your feet. Depending on your terrain, protection may be essential or barely relevant. Smooth, runnable routes on forest tracks don’t call for heavy protection.

Criterion #6: cushioning

This is one of the most personal criteria. The trail market has everything: minimalism (barefoot), maximalism (oversize), carbon plates, carbon rods, gels, air, super-resilient foams… With so many brand technologies, it’s easy to get lost. One piece of advice: don’t chase trends, and listen to what you actually like.

If you like feeling the ground, you’ll usually prefer lower cushioning. On the other hand, if you want to feel insulated from the trail, look for more cushioning or a more “filtering” ride (and sometimes a low-cushioning shoe can still mute the ground a lot). Bounce, smoothness through toe-off, soft or firm step-in feel: everyone has to figure out what works for them. The more different models you try, the more clearly your preferences will emerge. Don’t hesitate to pull on several pairs with very different profiles to compare sensations.

Criterion #7: drop

Drop is the height difference between heel and forefoot. The minimalist movement promotes a zero-drop setup to encourage a natural stride, with the foot level as if you were barefoot. Most shoes, however, sit between 4 and 8 mm. Beyond the feel, remember that a lower drop loads the calves and Achilles tendon more. Be careful if you’re sensitive there. Whatever your running, any move to a lower drop should be gradual (several weeks, sometimes several months).

Don’t confuse drop with stack. Stack is the height of the sole under the heel, in other words the distance between your foot and the ground. It’s the combined height of the outsole, cushioning foams, and the insole. You can absolutely have zero drop with a high stack.

Criterion #8: weight

In trail, shoes are often heavier than road running shoes because they’re more reinforced. Still, as in many sports, brands try to keep weight down because mass carried at the ends of the limbs (feet or hands) increases energy cost. Weight can be a legitimate factor, but it shouldn’t be a dealbreaker on its own. Try them on, move in them, and trust your feel more than the number on the spec sheet: sometimes a shoe can feel lighter even if it’s heavier than others.

Criterion #9: sizing

On uneven terrain, your foot moves around a lot inside the shoe. On descents, it slides forward. Anyone who’s made the mistake of buying too snug knows what happens next: black toenails. It’s generally recommended to go up half a size to a full size from your usual fit, so you have enough room in the toe box to avoid repeated toe impact on downhills.

And sizing, while supposedly universal, varies from brand to brand. Always try shoes on before buying, and test both the size you think is right and the one above or below, so you can compare and pick what truly fits best.

Criterion #10: price

Price can be misleading: the most expensive shoe isn’t necessarily the best fit, the most durable, or the most efficient for you. Of course, budget still matters, especially if you can’t spend freely. If the running shoe market has seen real inflation in recent years, with a particularly sharp jump driven by the arrival of carbon, keep in mind that the most high-tech shoe won’t automatically make you run faster.

Some big sporting goods chains have built real trail-shoe know-how and offer genuinely solid models at very competitive prices. Also keep an eye on sales and classifieds to score a second-hand pair. Just be cautious about condition: midsoles break down fast.