My Mammut Sertig III review goes in depth on one of the best new hiking shoes of 2026. The first two Sertigs were trail running shoes, but Mammut transformed the Sertig III into a true hiking shoe. Over the past two weeks, I've personally tested the new Sertig III Low GTX while hiking 40 hard miles in the desert mountains of New Mexico. My Mammut Sertig III review goes in depth on this shoe's support, weight, fit, comfort, weather protection, traction, and overall value.
Mammut Sertig III Hiking Shoe Review
To review the new Mammut Sertig III Low GTX, I stacked a series of day hikes that spanned a range of difficulty levels and terrain, including speed hiking in Bear Canyon Arroyo (7 miles, 1200 ft elevation gain), an easy hike at Domingo Baca Canyon (5 miles 1000 ft), traction tests on the scree and slick rock in Embudito Canyon (5 miles, 1200 ft), and more difficult trails, including the Pino Trail (9.2 miles 3000 ft), Embudito Trail (8 miles 3250ft), and South Sandia Crest (11 miles, 4000 ft).
As always, my reviews are 100% independent (not sponsored posts) and based on my first-hand hiking experience. You can trust my takes because I'm the former footwear manager at Appalachian Outdoors and Gearhead® Expert at Backcountry—a leading outdoor specialty retailer in the U.S.
Testing the Mammut Sertig III in Domingo Baca Canyon
Sertig III Support
I tested the new Mammut Sertig III on some tough trails, and it provided plenty of support for long hauls over steep and rocky terrain. This shoe especially impressed me on a grueling hike up to South Sandia Crest. My feet felt fresher than they should have after 11+ miles and 8,000 feet of accumlated ups and downs—much of which was off trail.
Even though it's a low-cut, the Sertig's sturdy base prevents hikers' feet from over-flexing on rocks, roots, and steep terrain. This shoe's torsional rigidity is also solid. Even on steep side hills (which put extra pressure on your downhill ankle), my genetically weak ankles held up. This shoe's support is good enough for hard hikes—even though it's a lightweight hiking shoe.
The Mammut Sertig III meets my definition of a lightweight hiking shoe
Sertig III Weight
Even in a size 13, the Mammut Sertig III only weighs two pounds per pair—about 4 ounces less than the average men's hiking shoe. This qualifies the new Sertig III as a lightweight hiking shoe in my book. Its weight is especially impressive when you consider how much support this shoe offers hikers. During testing, it felt both sturdy and nimble on the trail.
Mammut widened the Sertig's fit for 2026
Sertig III Fit
I get my best fit in the Mammut Sertig III by sizing up one full size from my everyday shoe size. The Sertig III hiking shoe is wider than the Sertig II trail running shoe—not as narrow as most European brands. If you have wide feet (like me), you may (or may not) get enough width by sizing up that full size.
During testing, I personally found the Mammut Sertig III comfortable
Sertig III Comfort
A hiking shoe's comfort ultimately hinges on fit, your hiking style, and your personal preferences. That said, I found this a comfortable hiking shoe, even on tough trails.
The Mammut Sertig III has a unique feel, thanks to a high stack of high rebound foam. In other words, there's more cushioning than most hiking shoes. But that extra cush didn't bog me down during my test hikes because that foam is more responsive than soft.
For comparison, the Mammut Sertig III is much more cushioned than the Salomon X Ultra 5—while matching that best seller's mix of stability and agility. It's rare to find a hiking shoe that pulls off plenty of cushioning and plenty of performance in the same package. But I can see both hardcore day hikers and fans of lightweight hiking shoes digging the feel the Sertig III. It's got something for everyone.
The Sertig III GTX features GORE-TEX waterproofing
Sertig III Weather Protection
The Mammut Sertig III Low GTX features GORE-TEX ("GTX") waterproofing. Some online trolls like to rip on GORE-TEX, but it's the most reliable and breathable waterproofing you'll find in a hiking shoe. With New Mexico mired in drought, I couldn't test my shoes' waterproofing as thoroughly as I would have liked. Still, my feet stayed dry on an after-rain hike in Embudito Canyon and during easy water crossings in Domingo Baca Canyon.
This shoe only provides about 3.5 inches of waterproof protection—well shy of a mid-cut hiking boot. But the GORE-TEX is a clear weather protection plus for the Sertig III.
This tread balances aggressive lugs with good rock traction
Sertig III Traction
I can usually flag a few weaknesses in the hiking shoes I review, but I'm also a fan of the tread on the Mammut Sertig III Low GTX. I hiked almost every surface imaginable in this shoe—desert crust, gravel switchbacks, scree, mud, pine needles, slick rock, off-trail climbs which gained 1500 feet in just one mile—with no noticeable slips.
This traction was especially impressive when I climbed more than 4000 feet up to South Sandia Crest on an unofficial social trail. The lugs had solid bite on steep ups and downs and handled scrambling and slicksrock better than I expected. If you hike mixed mountain terrain, you can trust this shoe's tread.
One of several women's colorways for the Mammut Sertig III Low
Value
If you haven't noticed, footwear prices have skyrocketed in 2026. While many of the best hiking shoes now cost more than $200 (gulp), the Mammut Sertig III hiking shoe debuted at $179 (MSRP). That's a good price in today's (tariff and inflation-driven) market. If you don't need waterproofing, you can find the non-waterproof Sertig III Low for $149.
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Men's Mammut Sertig III Low
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Women's Mammut Sertig III Low
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Pros and Cons of the Mammut Sertig III Hiking Shoe
After 40 miles of testing, my review of the Mammut Sertig III hiking shoe is overwhelmingly positive. Here's an overview of this shoe's pros and cons:
Should you buy the Mammut Sertig III hiking shoe?
As always, the key to buying the best hiking shoe is to pick the best fit for your feet and to choose a shoe that matches your hiking style. The Mammut Sertig III has a standard fit (just size up) with a build that can handle most types of day hikes, including difficult hikes over mountainous terrain.
Based on my review, I've added the Mammut Sertig III Low GTX to my list of the best hiking shoes. I recommend it for day hikers who want a supportive yet lightweight hiking shoe that's well cushioned with premium waterproofing and excellent, multisurface traction.
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Men's Mammut Sertig III Low
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Women's Mammut Sertig III Low
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