Expanding my brand knowledge for 2025, I recently tested and reviewed the Mammut Sertig II trail running shoe with hikers in mind. Mammut is a Swiss brand that's better known for its ropes and alpine gear than its footwear. But the Sertig II has impressed me through a series of test hikes in New Mexico's Sandia Mountains. This shoe not only looks sick. Its stellar blend of support, weight savings, cushion, and clutch traction earned it a spot on my updated list of the best trail running shoes for hikers. My Mammut Sertig II review shares what I learned about this shoe over the past six months of testing it on the Pino, Embudo, Embudito, Piedra Lisa, Tres Pistoles (3 Guns), and La Luz trails outside Albuquerque.
Testing the Mammut Sertig II at La Luz Trail, Albuquerque
Mammut Sertig II Low Review
My review of the Mammut II Low is based on close to 100 miles of hiking in New Mexico. By design, I hiked a wide range of trails outside Albuquerque to evaluate this shoe's support, weight, fit, comfort, weather protection, and traction. I speed-hiked through sandy arroyos, scrambled up and down bouldery canyons, and slogged my way up and down steep trails up to 10,000+ feet. As always, my reviews are 100% independent and based on my personal hiking experience and my professional experience in the outdoor gear industry. Unlike most footwear reviewers, I've been hiking 1000+ miles per year for two decades and previously managed footwear at a hiking and backpacking shop, where a podiatrist trained me in hiking footwear. That means I know what to look for when I test and review hiking footwear.
Testing the Mammut Sertig II at Embudo Canyon, New Mexico
Support
The Mammut Sertig II is made for trail running—not hiking—so its foot and ankle support fall short of true hiking boots. That being said, its support runs above average for a trail runner since it's built for mountainous terrain. My feet and ankles aren't great, due to genetics, but I've felt confident hiking moderate to difficult terrain in this shoe, thanks to its relatively robust build. Honestly, it's sturdier than several hiking shoes I've reviewed in spite of being lighter and more athletic.
The Sertig is stiff (yet cushy) from my heel to my foot's natural flex point. This added stiffness through the midfoot limits how much my feet flex over rocks and uneven terrain. Plus, it adds torsional rigidity, making it tougher to turn over an ankle, even though this shoe is a low-cut, not a mid- or high-cut. This robust build has kept my hiking feet and my ankles feeling fresh, even on some gnarly terrain that puts extra pressure on the lower body. This isn't the sturdiest trail runner I've hiked in, but it's up there—in spite of its light weight.
Weight
The Mammut Sertig II is surprisingly lightweight, given its robust soles and generous cushioning. My men's size 13 weighs 1 lb 10 ounces per pair. That's only two ounces heavier than the lightest trail runners I trust for hiking. Compared with true hiking footwear, it's 4-6 ounces lighter than my lightweight hiking shoes and more than a half-pound lighter than the average hiking shoe. Unlike the Mammut Ducan hiking shoe, the Sertig II has an outstanding support to weight ratio. If you're looking for a trail runner with a good balance between support and weight savings, the Mammut Sertig II is a strong contender.
Women's Mammut Sertig II Trail Running Shoe
Fit
I sized up more than normal to get a comfortable fit in the Mammut Sertig II trail running shoe. My everyday shoe size is a 11.5 men's, and I wear this shoe in a 13 to get enough width for my wider feet. This shoe fits me much better in this size than the narrower Mammut Ducan Low. Its athletic cut runs snug in the heel to prevent slipping with more of a standard width in the forefoot—similar to LOWA or Scarpa in fit. Hikers with more standard-sized feet won't need to size up as much as I did for my wide feet. However, I still recommend sizing up a 1/2 size from your typical hiking size as a starting point for Mammut.
The Sertig II's tall stack height softens its sturdy footing on the trail
Comfort
Comfort has a lot to do with fit and with matching your footwear to your hiking style. This shoe has a unique feel in the sense that it's both stiff and well cushioned. It's a running shoe made for mountains, so there's good foot support. But it also features a tall stack of responsive EVA foam cushioning to absorb shock. (If you're into drop, this shoe is a moderate 7mm.) Personally, I love the feel.
I've literally worn this shoe side-by-side with other top trail runners for hikers. That is, I've put the Sertig on one foot and other best sellers on my other foot during my comfort tests. The Mammut foam is firmer than the max cushion HOKA Speedgoat 6 or Salomon Thundercross. The Sertig II feels more like a lighter, more athletic Brooks Cascadia. When I crushed a long and steep hike up to the South Sandia Crest, I was impressed with the Sertig's comfort for such a performance-oriented mountain shoe.
If you like your trail runners ultralight and flexible, you'll probably find this shoe overbuilt. But if you like a stiffer, more supportive trail runner that softens things up with some extra cush, you'll like the Mammut Sertig II.
The Sertig II GTX adds GORE-TEX waterproofing
Weather Protection
I reviewed the non-waterproof Sertig because most hikers who choose trail runners prefer them for their superior ventilation and faster drying times. Obviously, my pair doesn't provide much weather protection, but it does wear slightly cooler in the warm New Mexico air.
However, the Sertig II Low GTX adds GORE-TEX ("GTX") for a waterproof and breathable layer inside the shoe to fend off rain, show, and puddles. More specifically, the Sertig GTX uses GORE-TEX Invisible Fit, which is not as bulky as a standard GORE-TEX membrane and also more breathable. You won't get more than 2-3 inches of water protection from a GORE-TEX trail running shoe. However, the GORE-TEX Invisible fit in the GTX model of the Sertig II is a clear plus for those who want a waterproof trail runner.
Traction
My pair of Sertigs have handled all sorts of terrain well. My test hikes have run the gammut—from sand to solid rock, from wet trails to weathered granite—and I've come out of all of them slip-free in the Mammut Sertig II. Overall, I'd rate the tread as moderate, all-terrain traction. Some lugs have aggressive edges, which helps on the steep trails in the Sandia mountains that I frequent. At the same time, there are enough points of contact and soft enough rubber for these soles to stick to rocks pretty well, too. This tread doesn't excel at any one thing. But it handles pretty much anything, making it a good shoe for mountain trails.
Value
With a MSRP of $139, the Mammut Sertig II sits at, or just under, the average price of the best trail runners for hikers. Compared to similar shoes I recommend, the Sertig costs the same as the Salomon Thundercross and Brooks Cascadia and $16 less than the HOKA Speedgoat 6. It seems perfectly priced, given these comps. If this shoe fits your feet and matches your hiking style, it's a good value.
Mammut Sertig II: Pros and Cons for Hikers
My Mammut Sertig II review has evaluated this trail running shoe with hikers (not runners) in mind. Here's a quick overview of its pros and cons:
Should you buy the Mammut Sertig II Low?
For me, the Mammut Sertig II trail running shoe is a better hiking shoe than the Mammut Ducan Low GTX I've tested and reviewed. Similar to Salomon shoes, the Sertig II has an outstanding support to weight ratio, providing a sturdy hiking base without weighing hikers down. At the same time, it adds extra cushion to soften the shoe's otherwise stiff build. Honestly, this shoe exceeded my expectations. That's why it's earned a spot of my list of the best trail running shoes for hiking. Based on 100 miles of test hikes, I recommend the Sertig II for men and women who want a lightweight yet supportive hiking shoe to tackle mountain trails. If this shoe fits you well, it should serve you well, especially on moderate to difficult terrain.
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