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.


Update: Merrell All Out Crush 2
Terrain: Trail
Arch support: Neutral
Weight: Men: 8oz | Women: 7oz
Heel to toe drop: Men: 6mm | Women: 6mm
Pronation: Neutral Pronation
Arch type: High arch
Strike Pattern: Midfoot strike
Distance: Competition
Heel height: Men: 24mm | Women: 24mm
Forefoot height: Men: 18mm | Women: 18mm
Brand: Merrell
Type: Low drop
Width: Men: Normal | Women: Normal
Price: $100
Colorways: Black, Blue, Grey, Red
Special editions: 2 special editions
Small True to size Large
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A top 10% best Trail running shoe

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.

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85 / 100 based on 10 expert reviews

  • 87 / 100 | Get Out There Gear | | Level 2 expert

    Merrell's All Out Crush performs very well and cleans up easily.

  • 90 / 100 | Obstacle Racing Media | | Level 1 expert

    Great OCR shoe.

  • 80 / 100 | Running Competitor | | Level 5 expert

    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 / 100 | Running Warehouse | | Level 4 expert

    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 / 100 | Active Gear Review | | Level 4 expert

    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 / 100 | Trail to Peak | | Level 4 expert

    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.

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  • 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.

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. This outsole material is also used in the Merrell All Out Crush 2.

The midsole of this Merrell running shoe is 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.


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.