Arch support
M: 227g | W: 198g
Heel to toe drop
M: 6mm | W: 6mm
Heel height
M: 24mm | W: 24mm
Forefoot height
M: 18mm | W: 18mm
Widths available
M: Normal - D | W: Normal - B
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Shoes best for road, track and light gravel. See the best road shoes.


Shoes best for trail, off road, mountains and other unstable surfaces. See the best trail shoes.

Good to know

As long as you stick to the road or path, and if you want just one running shoe, buy a road running shoe.

Neutral / cushion / high arch

Shoes for runners who does not need any additional arch support (Around 50% of runners). Best for people with high or medium high arches. See the best neutral shoes.

Stability / overpronation / normal arch

Shoes for runners who needs arch support (Around 45% of runners). Best for runners with a normal arch. See the best stability shoes.

Motion control / severe overproanation / flat feet

Shoes for runners who needs a lot of arch support. Best for runners with flat feet. See the best motion control shoes.

Good to know

- Rule of thumb: If in doubt, buy neutral shoes to avoid injuries.
- More about arch support in this video.
- Find your arch type by following steps from this video.

Daily running

Cushioned shoes for your daily easy running. Great comfort. See best shoes for daily running.


Lightweight shoes good for races, interval training, tempo runs and fartlek. Here are the best competition running shoes.

Good to know

If you want just one pair of shoes, buy a shoe for daily running.

The height difference from the heel to the forefoot, also known as heel drop, toe spring, heel to toe spring or simply drop.

There are many opinions about what a good heel drop is. We do not recommend any in particular. Lean more in this video.


We spent 9 hours reading reviews from experts and users. In summary, this is what runners think:

6 reasons to buy

  • Some runners mentioned that this shoe has the right amount of traction.

  • Many liked the lightweight construction of the shoe.

  • Some noticed that the upper material drains out water quickly.

  • This shoe provides a comfortable and great fit, according to some reviews.

  • It comes with different color options.

  • The shoe is very flexible according to some testers.

2 reasons not to buy

  • The sole unit of the All Out Crush is not as durable as expected.

  • Some runners are complaining the dirt getting inside the shoe while running.

Bottom line

The Merrell All Out Crush is designed for outdoor adventure and trail running. It delivers right amount of protection, comfort, durability and traction for the runners to survive the toughest terrain. This is best for long distance runs and hiking.

World wide, All Out Crush is in the top 20% most popular running shoes. The brand, Merrell, is the 12th most popular.

Map: Shows popularity per continent based on 1010 shoes


4.6 / 5 based on 387 ratings

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Expert reviews

Experts are running shoe geeks, 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.

85 / 100 based on 10 expert reviews

  • 87
    SvenLevel 2 expert
    by Get Out There Gear
    Merrell's All Out Crush performs very well and cleans up easily.
  • 90
    MattLevel 1 expert
    by Obstacle Racing Media
    Great OCR shoe.
  • 80
    Brian MetzlerLevel 5 expert
    by Running Competitor
    It features a lightweight TPU-film-reinforced upper with drainage holes for water displacement, plus an aggressive multi-direction lugged outsole made from a super grippy rubber compound.
  • 89
    JonathanLevel 4 expert
    by Running Warehouse
    Add the 6mm offset to the flexible sole and soft foam, and you’ve got a very well-balanced, smooth-riding, do-almost-anything, light weight trail shoe.
  • 88
    Kevin FongerLevel 4 expert
    by Active Gear Review
    The shoe runs well for the most part, but I find the fit in the toe box to be a too narrow for a medium width fit giving the shoe an awkward fit compared to other trail running shoes on the market.
  • 80
    Drew RobinsonLevel 4 expert
    by Trail to Peak
    The All Out Crush by Merrell looks to be a nice lightweight mountain shoe for hikers and runner who want to move fast through demanding terrain.
  • 84
    Matt DavisLevel 2 expert
    by Obstacle Racing Media
    My current favorite shoes are the Reebok OR, and these have many of the same great qualities in an OCR specific shoe.
  • 91
    Paul MudgeLevel 1 expert
    by Merrell Australia Blog
    I love the supportive cushioning nature of the shoe, its weightlessness vs support, but most importantly for me the ability to thrash through the muddy hills and paths and return home – give them a quick wash and know that they will be ready for my next muddy adventure.
  • 84
    Paul VincentLevel 1 expert
    by Gear Junkie
     And if you’re plowing through the deep mud and water of a Tough Mudder, it’s a winner, hands down.
  • 83
    Peter KochLevel 1 expert
    by Men's Fitness
    These are built for loose dirt trails (they push corners like never before) and speedy hardpack.
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These are visual presentations, not reviews

  • Nelly Shop Zappos
    Down at the bottom, there's an M-Select Grip outsole that delivers slip resistant traction on wet and dry conditions on mixed terrain.
  • Richard Shop Zappos
    The upper is washable, so it'll be easy to keep it clean and look fresh. You have a protective toe cap right here for some added durability for anything you'll encounter out there on the trail.

Updates to All Out Crush

The upper of the Merrel All Out Crush has a bulky airy mesh but is very cool because there is no barrier that will stop the air from cooling the foot. On wet and muddy grounds, the upper is wet but will tend to dry up quickly as the water is pushed out easily from the shoe with a draining system of two draining holes on both sides.

The upper is enhanced with a TPU cage pattern, a new innovation for shoes, which makes the shoe more durable and very easy to clean after tracking down the mud. Synthetic overlays are also added to the construction of the upper, and it comes with soft gusseted tongue and flat laces that hold the foot tightly and securely.

Merrel uses the Uni Fly midsole and plate for just a minimal amount of cushioning and for stability. There are two drainage holes on each side of the shoe as well for quick drying purposes.

The outsole has the Merrel Select Grip rubber sole with 5mm lugs. This design is for optimal efficiency on any obstacles, especially for the tough mudder competition.

All Out Crush size and fit

The All Out Crush offers a new sock like fit in its upper. The toe box area has a snug fit on its nice shape and volume. The mid-foot is also made more secure with the upper construction combining the open air mesh and synthetic overlays, and the heel area is snug without slippage for a more confident ride on trails. This shoe is available in standard running shoe width and length.


The outsole of the All Out Crush features the M-Select Grip outsole, a Merrel exclusive rubber outsole. It has lugs in 5mm designed in a great pattern for better traction and grip and for versatility. The rubber compound is soft and flexible, with flex cutouts in the forefoot area, while the lugs are solid.


The midsole of the All Out Crush are made from integrated EVA foot bed for its cushioning and the TrailProtect pad on the sole for added protection.


The upper of this shoe is made from the mesh materials with TPU synthetic overlays. A protective toe cap is also placed for added protection. These materials made the shoe cool and breathable, more durable, and easy to wash and dry up.


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