The world's most in-depth and scientific reviews of gear

Altra Lone Peak 4 Mid RSM Review

One of the more popular models seen on the big thru hikes of North America, this boot offers a unique fit and is ultra lightweight
Altra Lone Peak 4 Mid RSM
Photo: Backcountry
  • 1
  • 2
  • 3
  • 4
  • 5
Price:  $160 List | $127.96 at Backcountry
Compare prices at 2 resellers
Pros:  Great for wide feet, comfortable and light
Cons:  Zero drop takes getting used to, traction lacking
Manufacturer:   Altra
By Ryan Huetter ⋅ Review Editor  ⋅  Apr 21, 2020
  • Share this article:
Our Editors independently research, test, and rate the best products. We only make money if you purchase a product through our links, and we never accept free products from manufacturers. Learn more
57
OVERALL
SCORE


RANKED
#17 of 17
  • Comfort - 25% 7
  • Stability - 20% 3
  • Traction - 15% 4
  • Weight - 15% 9
  • Water Resistance - 15% 7
  • Durability - 10% 3

Our Verdict

The Altra Lone Peak 4 Mid RSM is a lightweight hiking boot that has become a very popular model among long-distance backpackers. Built for foot comfort, this unique shoe has a lot of room for those with wide feet. The boot is really a trail running shoe that has higher ankle coverage and more waterproof ability in wet weather and comes with handy features that allow it to pair well with gaiters. We like this boot for specialized applications as a long-distance lightweight hiker, but it was not as well-rounded as other models that are also capable as a fastpacking boot.

Compare to Similar Products

 
Awards  Editors' Choice Award Top Pick Award Top Pick Award Top Pick Award 
Price $127.96 at Backcountry
Compare at 2 sellers
$229.95 at Backcountry
Compare at 3 sellers
$249.95 at Amazon
Compare at 3 sellers
$142.97 at Backcountry
Compare at 2 sellers
$164.95 at Backcountry
Compare at 3 sellers
Overall Score Sort Icon
57
80
79
77
76
Star Rating
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
Pros Great for wide feet, comfortable and lightComfortable out of the box, fast and nimble, great stability, support, water resistanceBest choice for rock and snow travel, durable, breathes wellAmazing comfort, stable, great tractionComfort of a trail runner with more support and stability, good all around performance, lightweight
Cons Zero drop takes getting used to, traction lackingNot as good for warm or hot environments, priceyWider fit, not the best lace locking systemNot as capable in off-trail terrain, rockered sole feels unnatural at firstCould be more breathable, not great traction on smooth rock
Bottom Line The super light Lone Peak 4 is built with foot comfort in mind, making these great for long days on the trailThis boot is a capable beast of stability and protection without weighing you downFor hikers venturing off trail into rocky or snowy terrain, this boot offers stability and traction that no other boot doesThe ultimate in comfort for on-trail enjoymentA proven performer from short walks to intense thru-hikes, with shoe comfort in lightweight boot form
Rating Categories Altra Lone Peak 4 Mid RSM Salomon Quest 4D 3 GTX Scarpa Zodiac Plus GTX HOKA ONE ONE Kaha GORE-TEX Salomon X Ultra Mid 3 GTX
Comfort (25%)
7
9
7
9
8
Stability (20%)
3
9
9
8
7
Traction (15%)
4
8
10
7
8
Weight (15%)
9
4
6
7
9
Water Resistance (15%)
7
9
8
7
7
Durability (10%)
3
8
7
7
6
Specs Altra Lone Peak 4... Salomon Quest 4D 3... Scarpa Zodiac Plus... HOKA ONE ONE Kaha... Salomon X Ultra...
Weight per Pair (Size 11) 1.77 lbs 3.30 lbs 2.65 lbs 2.45 lbs 2.28 lbs
Boot Type Lightweight Hiker Midweight Hiker/Backpacking Boot Midweight Hiker/Backpacking Boot Midweight Hiker/Backpacking Boot Midweight Hiker/Backpacking Boot
Width Options Regular Regular Regular Regular Regular and Wide
Waterproof Lining eVent Gore-Tex Performance Comfort Gore-Tex Gore-Tex Gore-Tex
Upper eVent Nubuck leather and textile 1.8mm Suede Perwanger Leather Waterproof PU coated leather
Last Board/Shank None 4D Advanced Chassis BZ last None Molded shank
Midsole Dual-layer EVA w/ StoneGuard Dual density EVA PU + 3D EVA-MP EVA Injected EVA
Sole DuraTred w/ TrailClaw ContaGrip Vibram Drumlin / Mont Vibram MegaGrip Non-marking ContaGrip
Warranty 300-500 mile warranty 2 year 1 year 45 day 2 year
Sizes Available 7 - 15 US 7 - 13 US 37 - 48 EU 7 - 14 US 7 - 13 US
Color Options Yes Yes No Yes Yes

Our Analysis and Test Results

We tested this boot in the foothills of the Sierra Nevada Mountains, hiking over rock and scree, through talus and snow, and even used them for trail runs.

Performance Comparison


Putting the Altra Lone Peak to the test in the rocky hills east of...
Putting the Altra Lone Peak to the test in the rocky hills east of the Sierra Nevada.
Photo: Ryan Huetter

Comfort


Altra has certainly been making a name for themselves as one of the most popular models for long-distance thru-hiking, so certainly they must be doing something right in the comfort department. Our lead tester was not familiar with the fit and feel of Altra shoes prior to testing the Lone Peak 4 Mid RSM. We were immediately impressed at how soft and roomy they feel, right out of the box. The soft material requires no break-in period, so they are ready to hit the trail.

The Lone Peak boots are quite nice on flat trails, but the...
The Lone Peak boots are quite nice on flat trails, but the relatively thin 25mm soles allow us to feel a lot of the rocks when in more rough terrain.
Photo: Ryan Huetter

The fit is unique and may take a bit of time to get used to. Altra shoes and boots are known for their "zero drop" soles, meaning there is no change in height from the heel to the toe. This makes the foot sit flat (which some podiatrists recommend as being more foot healthy). We are getting used to this, but we did really enjoy the width of the Footshape toe box, which allows our feet to spread out and relax, resulting in fewer hotspot issues than we would have expected.

The laces on the Lone Peak 4 go all the way up (no lacing hooks), so...
The laces on the Lone Peak 4 go all the way up (no lacing hooks), so you have to pull the boots on a bit using the pull tab.
Photo: Ryan Huetter

Stability


The Lone Peak 4 boots are essentially a beefed-up trail running shoe, so let's start there when assessing their stability. Obviously they will not stack up well against a rugged mountain boot made from full-grain leather, but on their own, are they stable? They have a 6-inch ankle cuff height, which drops to 4.5-inches in the back, and this allows them to flex well when making long strides. The laces can be cinched down for a secure fit, which acts as much as a reminder not to roll your ankle as anything else. This boot has virtually no torsional stability built into the midsole.

The Lone Peak is a soft boot, for sure. We slopped around quite a...
The Lone Peak is a soft boot, for sure. We slopped around quite a bit when testing these boots on the boulder fields.
Photo: Ryan Huetter

The real question around stability, for us, revolved around the space in the footbed. This wide fit gives a lot of room to wiggle around, which can be nice when on simple terrain, but when side-hilling and hopping through challenging off-trail conditions, we chose to move more cautiously due to the limited stability offered by our footwear.

Traction


Altra uses a proprietary rubber compound and tread design called Duratread on their Lone Peak 4 Mid RSM boots. We find it to be good on trails and other firm surfaces and had good experiences on wet and dry trail types. The boots are wide so there is a lot of surface area contact, but the wide fit also keeps them from edging effectively and we did not feel confident while boulder hopping in off-trail talus or when carrying heavy loads.

Whoa! Almost went for a dive into the mud there! The Lone Peak 4s...
Whoa! Almost went for a dive into the mud there! The Lone Peak 4s had pretty mediocre traction in soft conditions like mud and snow.
Photo: Ryan Huetter

We also are not super impressed with their performance in slippery conditions. The tread is very shallow, so they do not gain good traction in scree or mud.

Weight


The Altra Lone Peak 4 Mid boots weigh 1.77 pounds per pair. That is crazy light for a hiking boot, no matter what. Some of our favorite hiking shoes, which are low-cut, often struggle to make that weight. Yet, these are not the lightest boots in this review.

Wearing these for hours at a time on the foot was almost unnoticeable, so even though they did not win in this metric, they were so close that we gave them a very high mark in regards to their overall weight.

Water Resistance


The Altra Lone Peak 4 Mid RSM is built to withstand rain, snow, and mud. We find that it offers good waterproofness in wet weather, and keeps snow and mud out (but that we are not as stoked for the snow and mud due to some traction limitations). The way Altra gets their waterproofing is pretty cool - instead of using the traditional waterproof/breathable membrane that is sewn into the inside of the boot, they use a fully waterproof upper fabric material made of eVent. This techy solution saves some weight and lets them breathe a bit better than other models we tested in warm weather.

The RSM model is equipped with an eVent fabric that works well to...
The RSM model is equipped with an eVent fabric that works well to keep the water out.
Photo: Ryan Huetter

Some users have issues with the waterproofing, though in our field testing we stood in a cold mountain stream for 5 minutes and as long as the 4-inch flood height wasn't breached, our socks stayed dry.

Durability


We did not have any major issues while testing the Lone Peak 4 boots, but we anticipate that it won't be long before we do. The upper material is just so light and many of the seams are glued or welded and not sewn, leaving many opportunities for delaminations, which lots of users report as a problem. This is one of the issues with going lightweight in materials, they will not usually be durable for more than a season or so of hard use.

The tread on the Lone Peaks is pretty soft, we anticipate them...
The tread on the Lone Peaks is pretty soft, we anticipate them wearing out after a summer of use.
Photo: Ryan Huetter

Value


For the weight and comfort, as well as the high-tech waterproof fabrics, these boots are a good value.

Conclusion


We appreciate the Altra Lone Peak 4 Mid RSM as a specialized hiking shoe that will feel at home on a long-distance hike such as the JMT, PCT, or Appalachian Trail. They do well on the trail and are really lightweight, making them great for this application, as well as for those just looking for a comfortable, wide boot that is also appropriate for light hiking trips.

Ryan Huetter