Salomon X Ultra 4 Mid GTX Hiking Boot Review (2026): Light

Why you should trust this review

I bought the X Ultra 4 Mid GTX and put seven months and roughly 150 hours on them across wet New England forest and dry Colorado scree. Salomon did not provide them and had no part in this. A day-hiking boot proves itself over a real season, because the things that matter, whether the waterproofing holds through sustained rain, whether the traction grips wet rock, how fast a synthetic upper wears at the flex point, only show up over months and varied terrain. That is what this is built on.

I did not lab-test the membrane, so where I judge durability I draw on what I saw over seven months and the broader owner record, labeled as such. What I can tell you firsthand is how this boot moved on fast, graded trail in mixed weather, where the narrow last and synthetic upper show their limits, and whether it earns the best day-hiking boot call for the right foot.

How we evaluated

I wore the X Ultra 4 Mid on fast-paced day hikes across two very different environments, wet New England forest with slick roots and rock, and dry Colorado scree, with daypacks under 20 pounds. I tested the Gore-Tex through seven hours of sustained rain in a single outing, judged the Contagrip MA outsole on wet rock and loose scree, and assessed the Advanced Chassis for torsional stability without the stiff, clunky feel of a heavy boot.

I tracked the synthetic upper’s wear at the flex point over the months, since that is where these boots tend to age, and lived with the Quicklace system to judge fit adjustment. I assessed the narrow last honestly against wide-foot needs, since fit is the make-or-break factor on this boot.

Traction and waterproofing

The Contagrip MA outsole is the standout, gripping wet rock and slick roots reliably across the wet New England forest where slips are the constant danger, and holding on loose Colorado scree without skating. Across both environments the traction inspired confidence on exactly the surfaces that make hikers tentative, and the 5 mm lugs cleared debris well. For a fast-paced boot meant to move quickly over mixed terrain, the grip is genuinely excellent.

The Gore-Tex membrane backed it up. Through seven straight hours of sustained rain my feet stayed dry, which is the real test, not a quick puddle but hours of wet, and the boot shed it without wetting through. Across seven months of mixed-weather hiking the waterproofing held. Between the traction and the waterproofing, this boot handles bad conditions with real competence while staying light and fast, which is the combination that makes it special.

Stability, weight and the fast-day feel

The Advanced Chassis is the piece that lets this boot feel closer to a running shoe than a traditional mid. It provides torsional rigidity, the boot resists twisting on uneven ground, so your foot stays stable on rocky, off-camber trail, but it does it without the stiff, plodding feel of a heavy backpacking boot. The result is a boot you can move quickly in, which is exactly the point for fast day hiking at a brisk pace.

Weight reinforces that. At 920 g per pair it is light for a Gore-Tex mid, and on the trail that lightness translates to less leg fatigue and a quicker, more agile stride. The combination of stability, light weight and grippy waterproof construction is what makes the X Ultra 4 Mid feel like a fast-hiking tool rather than a load-hauler. For graded trail at pace with a light daypack, it is genuinely the best in its lane that I have tested.

Fit, durability and the honest drawbacks

The drawbacks are real and centered on fit and the upper. The last is narrow, a performance fit, and it is genuinely tight in the forefoot for wide or high-volume feet, if your toes have any extra room in your running shoes, this boot will feel snug, and there is no wide version of it. For narrow feet that fit is a precise, locked-in advantage, but for wide feet it is a dealbreaker, and you should size and try carefully or look at a roomier boot like the Merrell Moab or Keen Targhee.

The synthetic mesh upper is the durability weak point. It develops creasing at the flex point after around 100 miles, faster than a leather boot would, and while creasing is cosmetic at first, the synthetic upper will not last as long as full leather over years of hard use. The Quicklace system is fast but limits fine fit adjustment over the instep, so if you need to dial pressure precisely across the top of your foot, the standard-lace version of the X Ultra is the better pick. None of these undo the boot’s strengths, but they shape who it suits.

Who should buy the Salomon X Ultra 4 Mid GTX?

Buy it if you hike fast on graded trail in mixed weather with a daypack under 20 pounds, you have narrow or normal-volume feet, and you want Gore-Tex waterproofing in a light, sub-1 kg mid. The Contagrip grips wet rock and scree, the Gore-Tex sheds sustained rain, and the chassis gives stability without stiffness. For fast day hiking, this is the right tool and the best in its lane for the right foot.

Skip it if you have wide or high-volume feet, where the narrow performance last will pinch and there is no wide version, or you carry heavy multi-day loads, where the stiffer Salomon Quest 4 GTX is the better boot. If you want maximum upper durability over years, the synthetic mesh creases and wears faster than leather, and a leather boot like the Keen Targhee lasts longer.

The verdict

Seven months across wet forest and dry scree confirmed the X Ultra 4 Mid GTX is the best day-hiking boot I have tested in its lane. The Contagrip grips wet rock and loose scree, the Gore-Tex stayed dry through seven hours of rain, and the Advanced Chassis delivers real stability without the stiff feel of a heavy boot, all in a light, fast 920 g package. For graded trail at a brisk pace with a light daypack, it moves like little else.

The compromises are about fit and the upper, not performance. The narrow last punishes wide feet with no wide option, the synthetic upper creases at the flex point faster than leather, and the Quicklace limits fine instep adjustment. For wide feet or heavy loads, look elsewhere. But for a narrow-to-normal-footed fast day hiker who wants light, waterproof, grippy and stable, this boot earns its recommendation, and it is the one I reach for when the day calls for moving quick.