Merrell Agility Peak 4: Run all terrain with protection 

There are three elements of the Agility Peak 4 that make it such a versatile and protective shoe: (1) copious amount of cushion, (2) rock plate, and (3) grippy Vibram Megagrip outsole. Combined altogether, they help mute out impact shock and keep the foot well-shielded from harsh ground elements. 

And to make the Agility Peak a true multi-terrain trail shoe, it's made with a very clingy outsole. Throw just about anything at it, and it can handle it with ease. 

Who and what is it for? 

Since the Agility Peak 4 has a lot of cushion, it's suited for beginner to intermediate trail runners, heavy runners, and can even accommodate ultrarunners. It may tackle a lot of surfaces, but it also has its limitations. To find out, read on. 


  • Mountain running
  • Trail running
  • Trail walking/hiking 

Distances: Middle to long distance


  • Rough and rocky terrain
  • Mountains
  • Woodland trails
  • Steep, technical terrain 

Conditions: Wet and dry 

NOT for: 

  • Steep, muddy terrain 
  • Long, flat trails 
  • Wet rock 

Merrell Agility Peak 4 vs. 3

Lighter, more protective ride: This is owed to the more featherweight but more abundant FloatPro foam of the shoe. It cradles the foot and absorbs impact effectively without adding any bulk.

Better grip: With an updated Vibram Megagrip outsole, the shoe has better traction than its precursor, and can handle more terrain. 

More protection: Designed with a rock plate, the shoe keeps the foot safe from any abrasive and sharp ground elements. 

Enhanced lockdown: With a new tongue design (gusseted/attached to the sides), the heel and midfoot are made more secure. 

Facts / Specs

Terrain: Trail
Weight: Men 10.8oz / Women 10.2oz
Drop: 6mm
Arch support: Neutral
Pronation: Neutral Pronation / Supination / Underpronation
Arch type: High arch

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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.