We spent 6.6 hours reading reviews from experts and users. In summary, this is what runners think:

10 reasons to buy

  • Some runners were happy with how durable the Altra Lone Peak 4.0 RSM is.
  • According to some buyers, the shoe offers reliable grip on varied terrains.
  • Several users mentioned that the Lone Peak 4.0 RSM offers an excellent fit.
  • A couple of runners admired the shoe’s design and colors.
  • The waterproof material works great, said some happy customers.
  • A few noted that this trail shoe required no break-in period.
  • The design of the shoe offers a stable ride on uneven surfaces, said some user reviews.
  • Many purchasers commented that the shoe runs true to size.
  • The shoe has a wide toe-box, according to a few users.
  • The Altra Lone Peak 4.0 RSM feels great when walking and running, based on some user comments.

1 reasons not to buy

  • One user expressed disappointments with the shoe’s tongue that rubs his foot uncomfortably.

Bottom line

Based on overwhelmingly positive feedback for the Altra Lone Peak 4.0 RSM, there is no doubt that this is one of the well-liked running shoes from Altra. Runners are generally happy with the shoe’s performance, design, fit, and feel. Others even mentioned that they are willing to buy another pair when they need to. In summary, users considered the shoe as an excellent product with great value for money.


Terrain: Trail
Arch support: Neutral
Weight: Men: 10.9oz | Women: 9oz
Heel to toe drop: Men: 0mm | Women: 0mm
Pronation: Neutral Pronation
Arch type: High arch
Use: Jogging
Waterproofing: Waterproof
Material: Vegan
Strike Pattern: Forefoot strike
Distance: Daily running | Long distance | Marathon
Heel height: Men: 25mm | Women: 25mm
Forefoot height: Men: 25mm | Women: 25mm
Release date: Aug 2018
Brand: Altra
Type: Heavy | Big guy | Low drop | Zero drop
Width: Men: Normal | Women: Normal
Price: $150
Colorways: Black, Green, Grey, Red
Small True to size Large
See more facts

Expert Reviews

Experts are runners, who post reviews at youtube, directly at RunRepeat or at their own websites. Each expert is categorized from level 1 to level 5 based on expertise. See stats on expert reviews and how we calculate scores here.

Are you an expert? Apply to contribute here.

80 / 100 based on 1 expert reviews

  • 80 / 100 | Lorenzo Clerici

    The Altra Lone Peak 4.0 RSM

    More photos

    I must admit I bought those shoes quite in a hurry. I had planned a 50k Ultra on Austrian alps in early May. The weather forecast was awful: rain, snow, and mud.

    I did not have any decent waterproof running shoes at the time. Since I’m a big Altra fan (I ran a lot with Escalante 1 & 1.5, Timp 1 & 1.5), I decided to opt for the Lone Peak RSM, which seemed to fit perfectly for the weather I was going to face up very soon.



    The initial plan was to receive them with the Altra gaiters to use them together. Unfortunately, the gaiters did not arrive on time. Therefore, I had to go without, and this is the main reason why even though its waterproofness, my feet got wet while running in deep snow.



    However let’s see more in-depth the shoe, based on this, but even other experiences:

    Starting as usual from the bottom, the sole:

    The outsole uses Altra’s classic maxtrac rubber, which is nicely lugged with trail claws technology with the design recalling to the foot shape. Although the lugs are quite deep, they are soft, and this will provide a nice feeling even on concrete, but unfortunately, it means they will also wear out faster compared to stiffer trail soles.



    The midsole is medium cushioned and very comfortable. Suitable for mid-long runs from 20 km, up to 70 km with no pain for your feet. However, it tends to feel a bit flatten out after more than 200 km of usage.



    The inner sole gives you extra cushioning and decent arch support, although it is a Zero Drop.

    The fit is the typical Altra’s Foot shaped. A lot of space for your toes, which means freedom of movement and more stability to the ground. But this big room for your toes might be uncomfortable on the most technical or steep trails. Therefore I would avoid any Altra’s trail running shoes for super technical races.

    I’ve been a bit disappointed by the upper mesh. In the beginning, it worked very well, keeping my feet dry in every condition. Still, I noticed that the waterproof outer layer is worn off very quickly, and this meant the shoe lost its full impermeability pretty fast.



    Another thing I disliked is the lacing system. I know Altra wants to keep its wide toebox philosophy, but still, some more support on the midfoot would be suitable, and the lacing system does not allow you to get it firm and tight.



    Generally, the shoe is fun to run in severe weather conditions. Very comfortable, it provides a good cushioning and grip without being too heavy.

    Price seems honest to me (around 120-140$) for this kind of trail running waterproof shoe.

    The things I disliked is their durability: outer sole and upper mesh wear out too quickly.

    If you are used to run in Altra’s shoes or you are looking for a waterproof pair to use occasionally during rainy days, just go for it.

    But if you prefer to use one only pair of shoes for every type of weather, and that will last even after a lot of mileage, you’d better search somewhere else.

    This expert has been verified by RunRepeat. Reviews are neutral, unbiased and based on extensive testing.

  • First look | Backcountry Edge | | Level 1 expert

Become an expert

  • The Altra Lone Peak 4.0 RSM is a trail running shoe that’s designed for the neutral runner. The RSM in its name signifies the Rain, Snow and Mud specialty of the Altra All-Weather Series. Such a distinction is indicative of the presence of a waterproof upper and a highly aggressive outsole configuration.
  • Most of this off-road companion’s features focus on protecting the foot from abrasion and encouraging surface control through the trail-ready features of the sole unit. But underfoot comfort is also a primary purpose, with multiple technologies working together to ensure comfort and energized performance.

The Altra Lone Peak 4.0 RSM was crafted using the standard measurements. When it comes to size, runners can choose a pair with their usual sizing preferences in mind. Widthwise, the available options are D – Medium and B – Medium for men and women, respectively. The foot-shaped last accommodates the natural curve of the foot, as well as regular toe-splay.

MaxTrac™ is a thick rubber compound that covers the rest of the platform. The purpose of this component is to protect against abrasion and to provide a sure grip over the terrain.

The TrailClaw™ configuration involves opposite-facing gripping lugs that are responsible for gripping the ground. These protrusions heighten movement control during ascents and descents. The base of the metatarsals even contains anatomical nodes for extra support and handling.

A-Bound™ is a full-length cushioning unit that carries the foot throughout the running session. It is made using recycled materials, making it a compound that is friendly to the environment.

EVA is an industry-standard material that attenuates shock and encourages flexible support. It can withstand sagging or breakdown.

A protective layer called StoneGuard™ is placed between the A-Bound™ and the EVA foam. The goal of this add-on is to prevent sharp trail debris and surfaces from hurting the underside of the foot.

An even underfoot experience is the responsibility of the Zero Drop™ Platform. Such a design encourages natural foot balance and well-rounded impact dispersal when taking each step.

The Altra Lone Peak 4.0 RSM makes use of the eVent®, which is waterproof. Its job is to completely stave off water infiltration while maintaining breathability.

The 4-Point Gaiter Trap™ involves stitched and fused overlays that accommodate protective attachments and garments. This system further protects the interior chamber of this shoe from wetness and debris.

The FootShape™ Toe Box is a spacious forefoot section that permits the natural splaying of the toes. This layout potentially improves balance and control over the uneven topography.


Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.