Topo Athletic MTN Racer 4 review

The MTN Racer 4 takes the Topo fit onto rougher ground. Topo pairs a 33 mm heel and 28 mm forefoot platform with a Vibram Megagrip outsole, the same rubber used on most of the grippiest shoes on this list, and describes the shoe as built for race day and daily training on technical trails. The midsole compound is Topo's own, which it says is springier than EVA and keeps its rebound longer. A new FKT insole uses closed cell beaded foam so the shoe drains faster after water crossings, and an improved gaiter attachment works with Topo's Switchback Gaiter. Topo rates cushioning as high with a responsive feel and a 5 mm drop. The listed weight is 10.4 oz in a men's 9. Like the Ultraventure, it has a roomy toe box and wide sizes. Topo lists no rock plate and does not publish lug depth, so runners on very sharp scree may prefer the Merrell Agility Peak 6.

Who it is for

Runners who want Topo's roomy fit with stickier rubber for technical, wet or rocky trails and races.

Price

$155 for the men's version at the Topo US store when checked.

MTN Racer 4 $155.00
Quoted from the vendor pricing page on November 9, 2026.

Key features

• Vibram Megagrip outsole
• 33 mm heel and 28 mm forefoot stack with a 5 mm drop
• FKT closed cell insole that drains water quickly
• Upper tuned for technical terrain
• Gaiter attachment, compatible with Topo's Switchback Gaiter

Strengths and weaknesses

• Strength: Megagrip rubber with a roomy toe box
• Strength: Drains quickly after stream crossings
• Strength: Wide sizes from 7 to 15
• Weakness: No rock plate
• Weakness: Slightly less cushion than the Ultraventure 5
• Weakness: Topo does not publish lug depth

Key facts

• Price: $155 (men's)
• Weight: 10.4 oz (men's 9)
• Stack height: 33 mm heel, 28 mm forefoot
• Drop: 5 mm
• Outsole: Vibram Megagrip

Where it ranks

Topo Athletic MTN Racer 4 is No. 3 in our Best Trail Running Shoes verdict.