Verdict from 95 user reviews

6 reasons to buy

  • The traction capacity of the outsole unit is praised for being precise and dependable.
  • Some testers believe that the materials of the Merrell Fiery are dutifully long-lasting and robust.
  • A couple of runners note the inner sleeve of this Merrell trail running shoe as non-irritating.
  • The ghillie lacing system is appreciated by many for not being a source of material bunching/hot spots.
  • The padded tongue and collar are admired because they prevent in-shoe wobbling.
  • A few reviews have noted the supportive and shock-attenuating midsole unit.

2 reasons not to buy

  • A few testers have claimed that the forefoot section of the upper unit is quick to absorb water.
  • A consumer has reported that the traction of the outsole on wet ground is flimsy and inconsistent.

Bottom line

The overall reaction of runners towards the Merrell Fiery has been mostly positive. The structural elements of the Fiery turn this trail running shoe into a reliable option for daily adventures off the road. It provides an agile and maximum-protection ride that makes it suitable for rugged mountain terrains.

Neutral running shoe enthusiasts that like to take to the trails are the target market of the Merrell Fiery.

Tip: see the best trail running shoes.

Good to know

- The unpredictable nature of the trails needs a product that is up to the task. The Merrell Fiery offers form-fitting security, underfoot support, and trail surface traction. It takes inspiration from classic off-road runners as it has a bulky yet highly protective design that serves as a barrier against debris, uneven ground, and other hazards.

- Ethylene-vinyl acetate (EVA) is a compound that is used generously in this product. The full-length cushioning system is made of this industry-standard foam, as well as the removable contoured footbed. Acting as the external pad is Merrell’s own M Select™ GRIP, a layer that is tasked with providing traction and shielding.

Runners are welcome to make a purchase decision using their usual sizing expectations because Merrell has designed the Fiery to have a true-to-size configuration. However, it may prove essential to test the shoe first or read reviews that tackle the in-shoe feel to fully get an agreeable in-shoe experience.

When it comes to the sideways fit, runners can appreciate a snug wrap because of the presence of a multilayered mesh and a bevy of hot-melted overlays. Nevertheless, the brand touts the ghillie lacing system as an element that averts a too-restrictive hug.

M Select™ GRIP serves as the outsole unit of the Merrell Fiery. This compound generously covers the bottom part of the midsole foam, acting as a barrier between the cushioned piece and the potentially abrasive outdoor topography. Also, it has a naturally grippy nature which allows it to maintain surface control, even when tackling the uneven nature of the trails.

Aggressive gripping lugs pockmark the external pad. These prominent nodes have angular surfaces and clamp-like ends to heighten the grip on the ground. They can also potentially extend the lifespan of the shoe through their thick construction.

EVA is an industry-standard cushioning unit that runs the whole length of the Merrell Fiery. This element offers responsive cushioning and energized toe-offs. It also has a mildly flexible construction to accommodate the natural motion of the foot as it goes through the gait cycle. EVA is used by many running shoe series, including the well-known and trail-optimized Hoka One One Speedgoat family.

An EVA footbed separates the foot from the lasting board of this shoe. The soft surface of this accouterment is for the perception of an accommodating step-in environment. It also adds a bit of oomph to the quality of the cushioning. It can be removed or replaced with a new one if the wearer wants to do so.

A multilayered mesh serves as the facade of the Merrell Fiery. This material has the job of securing the foot and maintaining cool and dry coverage.

Synthetic overlays are printed onto the silhouette, with some sections connecting to the ghillie lacing system. A snug and secure wrap is the goal of this design.


How Merrell Fiery ranks compared to all other shoes
Bottom 18% trail running shoes
All trail running shoes
Bottom 30% Merrell running shoes
All Merrell running shoes
Bottom 7% maximalist running shoes
All maximalist running shoes


The current trend of Merrell Fiery.
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Jens Jakob Andersen
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.