Running Shoes vs Hiking Shoes: Which One for Which Day Out

Two shoes, one terrain, opposite priorities

Both categories are built for the same ground, which is why the question comes up. They disagree about what to optimize. A trail running shoe minimizes weight so you can move fast and takes its protection from a thick midsole. A hiking shoe accepts weight in exchange for stiffness and structure so it can carry a load over uneven ground for hours. On's own comparison of the two categories puts it as "lightweight and flexible" against "heavier and more supportive", with hiking shoes using "stiff midsoles, often reinforced with nylon or TPU shanks" and denser foams.

The four differences that matter

1. Sole stiffness, measured as torsional rigidity. This is the one that decides most cases. A stiff platform resists twisting on rock and under load; a flexible one lets your foot work naturally and roll through a stride. Trail running shoes span the range: RunRepeat scores the New Balance Hierro v9 at 5/5 — the stiffest rating it gives, and genuinely hiking-shoe territory — while lighter trail shoes sit far below that.
2. Lug depth and outsole. Here the two categories overlap almost completely. RunRepeat's trail guide treats lugs above roughly 4 mm as deep-lug, technical-terrain rubber, and the HOKA Speedgoat 7 measures 4.5 mm on Vibram Megagrip — the same outsole compound a lot of hiking footwear uses.
3. Weight. The three trail shoes we rank weigh 9.9–10.9 oz per shoe in RunRepeat's lab. Hiking boots commonly weigh considerably more, and the cost compounds over thousands of steps.
4. Underfoot protection. Hiking shoes use denser midsoles and more substantial outsoles; trail runners use a thick, softer midsole with a thinner outsole. Both work, but thinner outsoles transmit more sharp rock, which is the complaint most often made about running shoes on stony ground.

What about ordinary road running shoes?

Different question, simpler answer. A road running shoe has a smooth or lightly patterned outsole and a soft, unprotected midsole, so on a hike it gives you no grip on wet or loose ground and nothing between you and rock. It is fine on gravel paths, canal towpaths and dry fire roads — exactly the surfaces where you also do not need a trail shoe. The AAOS advice to match the shoe to the demands of the activity applies directly, and Harvard Health makes the same point about running and walking shoes being built around different motions. If you are deciding between road and trail rather than running and hiking, our running shoes vs trail running shoes comparison covers it.

The ankle support argument, honestly

The standard case for a boot is that the high collar protects your ankle. The honest position is that this is contested rather than settled, and that the platform under your foot matters more than the fabric above it: a torsionally stiff sole keeps the shoe from twisting in the first place, which is why RunRepeat measures and publishes that figure. A heel counter does measurable work too — the adidas Terrex Agravic 4 scores 4/5 for heel counter stiffness against the Speedgoat 7's 3/5. What no low-cut shoe does, trail runner or otherwise, is immobilise an ankle. If you have a history of bad sprains and you are carrying a pack over rough ground, that is the case where a boot is the sensible choice.

Three trail shoes that double as hiking shoes

If your hiking is day walks on trails rather than expeditions, these three are the ones we rank — and each covers a different part of the overlap. All lab figures on the cards are RunRepeat's.

The full ranking, with the lug-depth and durability tables, is best trail running shoes.

A decision table

Fit changes when you are walking downhill

One practical warning. Walking downhill for hours pushes your foot forward into the front of the shoe repeatedly, and feet swell over a long day. The AAOS half-inch of toe room and Running Warehouse's thumb's-width rule are minimums here, not targets. Many people go a half size larger for long days off road than for road running, and a heel-lock lacing pattern through the top eyelet is worth learning — our narrow-feet guide explains how to tie it. If your toes have been black after a hike, that is a sizing problem, not a shoe-category problem. See also what size running shoes to get.