Mammut Energy Trail All Mountain: First Run Review

Introduction

Mammut, the Swiss brand best known for outdoor gear, is making a serious push into trail running, and the Energy Trail All Mountain is one of three new trail shoes in its first lineup. Positioned as the solid, dependable, go-anywhere daily trainer of the trio, it promises durability, grip, and comfort across a wide mix of terrain rather than outright excitement. We laced it up for a first seven-mile run across grass, compact trail, gravelly trail, and soft sand to see how it holds up.

Specs and Construction

The All Mountain carries a 34mm heel stack with 26mm under the forefoot, an 8mm heel offset, and weighs around 315g in a UK 9.5. It launches in early March with five color options, plus a waterproof GTX version, at roughly £150 to £160.

The upper is built from lightweight, breathable, anti-abrasion engineered mesh that looks built to survive challenging trail miles. A well padded gusseted tongue sits across the top of the foot, with zonal padding wrapping the heel collar for comfort, a looped lacing system for secure midfoot lockdown, structural overlays, a heel pull tab, and a substantial toe bumper up front.

The midsole uses Mammut’s Core Plus setup, a supercritical nitrogen-infused foam aimed at comfort and longevity, and it feels noticeably firmer than several recent midsoles we have tested. Outsole duty falls to Mammut’s in-house sticky proprietary rubber paired with a Swiss-designed lug pattern mixing 4mm and 5mm lugs, with reverse-facing lugs at the heel for descents and forward-facing lugs under the forefoot for pace on the flats.

Who This Shoe Is For

This is the shoe for runners who want one reliable trainer to soak up weekly trail miles on varied terrain, rather than a race-day weapon or a max-cushion cruiser. If your rotation needs a dependable anchor shoe that will not demand attention mid-run, the All Mountain fits that brief neatly.

Main Strengths

Fit is the headline. The shoe runs true to size, and while the toe box looked tapered and narrow out of the box, it felt roomy in practice with good depth and plenty of wiggle room. The lacing system delivers a genuinely secure midfoot lockdown that stayed put for the entire run with no retying, and heel hold is solid.

The outsole impressed too. On the short muddy and slippery sections encountered, the in-house rubber gripped confidently with no slipping or sliding, and footing felt secure throughout. Across grass, compact trail, gravel, and soft sand, traction was never in question.

The upper was extremely comfortable from mile one, with the plush gusseted tongue spreading lace pressure nicely across the top of the foot. After a full seven miles there were no real negatives to report on fit or upper performance.

How It Performed on the Run

On the road mile before the trails, the midsole had enough cushioning to soak up heavier impact, and it stayed comfortable across every surface on the route. The trade-off is bounce. This is not an overly lively foam, and energy return felt modest rather than bouncy. That firmness does make the shoe feel very stable and planted, which is welcome in a trail trainer, but runners chasing a springy ride may find it runs a little flat compared with more modern, high-tech foams.

The 8mm heel offset is also worth noting. Runners who spend most of their time in 4 to 6mm shoes will notice the higher heel, though it never becomes dominant.

Things to Consider Before Buying

Two caveats stand out. First, the midsole prioritizes stability over energy return, so if bounce is your priority, the Endurance Ultra from the same lineup, with its dual-compound midsole, may be the better pick. Second, testing came in drier than ideal conditions, so muddier, boggier terrain remains untested even though early grip on slippery sections was promising.

Buying Advice

If you want a workhorse trail shoe with a comfortable, secure upper, trustworthy grip, and a stable ride at around £150 to £160, the Energy Trail All Mountain is an easy recommendation. If you want maximum cushioning bounce or a lower heel offset, look elsewhere in the range.

Conclusion

The Energy Trail All Mountain is exactly what Mammut set out to build: a dependable daily trail trainer that handles a big mix of terrain without drama. It will not blow your mind on the run, but it is comfortable, well built, and reassuringly sure-footed, which is precisely what an anchor shoe in your rotation should be.