Altra Lone Peak 9+ First Impressions: Zero-Drop Trail Comfort With New Vibram Grip

Introduction

The Lone Peak is Altra’s best-known trail running shoe, and the 9+ is its latest iteration. The headline change is easy to spot: the shoe now wears a Vibram MegaGrip rubber outsole, the sticky compound that has become a fixture on many modern trail shoes. Beyond that, this is still very much a Lone Peak, with the roomy anatomical toe box and zero-drop platform the brand is known for.

We took the 9+ out for a 7.27-mile first run across a mixed course of woodland trails, rocky sections, short tarmac link-ups, and some genuinely boggy mud. Here is how it performed.

Who This Product Is For

The Lone Peak 9+ suits trail runners who want maximum toe box volume and a zero-drop ride. If you prefer a bit of heel offset, the brand’s own reviewer perspective suggests something in the 4 to 6mm range can feel more comfortable over long distances, but if low or zero drop is what you are after and you value a spacious forefoot, this shoe deserves a close look.

Construction and Key Updates

The most visible update is the Vibram MegaGrip outsole, and Altra clearly wants you to know about it, with branding on the toe, heel, and midfoot. Lug depth is around 4mm, which is modest by trail standards. The midsole uses the brand’s Ego compound with updated comfort and ground connection, plus integrated stone guard technology for protection on rocky, technical trails.

The upper moves to a new ripstop breathable mesh aimed at longer-lasting durability, a welcome change given durability has been an issue in past versions. Durable overlays wrap the heel, midfoot, lace eyelets, and toe box for trail protection. Padding in the tongue, gusseted tongue, and ankle collar looks generous, and there are gaiter attachments including a velcro tab on the heel and a metal loop at the base of the laces.

Fit, Sizing, and Weight

Our UK 9.5 pair fit true to size on length, with a secure midfoot hold and plush heel and ankle collar. The wide toe box leaves plenty of room to splay, and even narrow-footed runners tend to find the lockdown surprisingly good. Some reviews suggest going down half a size, but in our testing that would have been too small.

On the scales, the UK 9.5 pair weighed 325g, which is heavier than the stripped-back look suggests. In practice, though, the shoe runs lighter than the numbers imply, thanks to a flexible midsole and a moderate 25mm heel and forefoot stack in a zero-drop configuration.

Traction: Strong Everywhere Except Deep Mud

On most surfaces the new Vibram rubber delivered real confidence. On rocky and stony trails the stone guard did its job, and short sections of tarmac were perfectly comfortable for linking up trails.

The weak spot was deep, boggy mud, particularly on downhill descents where more weight sits through the heels. The 4mm reverse-facing lugs slipped noticeably on steep muddy descents, demanding careful foot placement. In fairness, any 4mm-lug trail shoe would struggle in those conditions, but if your routes stay muddy for long stretches, keep it in mind.

Things to Consider Before Buying

The zero-drop platform is the big one. Even runners accustomed to low-drop shoes reported lower leg tightness and fatigue after 6.5 miles back in a zero-drop shoe. If you are transitioning from a 10 or 12mm heel offset, build up gradually: start with walks and short runs before heading out long.

Otherwise, the ride felt familiar rather than revolutionary, close to the previous Lone Peak generation, but that is not necessarily a bad thing if you already enjoy the shoe’s well-connected, nimble trail feel.

Buying Advice

At £130 in the UK, the Lone Peak 9+ sits at a reasonable price for a trail shoe with Vibram rubber, and it comes in five colorways including an all-black option if bright blue and lime is not your style.

If you want a zero-drop trail shoe with a huge toe box and a genuinely sticky outsole, the 9+ is an easy recommendation. If you regularly run steep, muddy descents or prefer a small heel offset, look elsewhere or proceed with realistic expectations.

Conclusion

The Lone Peak 9+ is a solid refinement of a proven formula. The Vibram MegaGrip outsole is a meaningful upgrade over the previous rubber, the ripstop upper should hold up better over the miles, and the fit remains one of the roomiest and most comfortable in trail running. Deep mud exposed the limits of the 4mm lugs, but as an all-round zero-drop trail shoe for mixed terrain, it is worth a closer look.