ShoesTopo AthleticMTN Racer 4

Topo Athletic

Topo Athletic MTN Racer 4

Topo Athletic MTN Racer 4. 34mm stack, 306g. Retailer specs verified on Running Warehouse.

PR Run Verified
Soft trailsRace day

PR Run scores

Grip3/5
Cushion5/5
Protection3/5
Durability4/5
Versatility3/5

PR Run derived fit scores

79Great

100-miler readiness

Will this shoe survive a hundred-mile night? 34 mm stack, cushion 5/5

71Great

Descent tolerance

Does it save your toenails on long descents? 29 mm forefoot stack

68Great

Swelling room

Room to grow when your feet swell? 34 mm heel stack

45Passable

Grit resistance

Does dust stay outside the shoe? Open mesh, expect grit

36Passable

Hot-day comfort

How well does it breathe in heat? Standard mesh

70Great

Achilles-friendly

Kind to a cranky achilles? 5 mm drop

Full specs

Drop

5 mm

Heel stack

34 mm

Forefoot stack

29 mm

Weight

306 g

Plate

No

Waterproof

No

Questions before you race

Is the Topo Athletic MTN Racer 4 good for 100-mile races?

Great. 34 mm stack, cushion 5/5. 100-miler readiness score 79/100.

Does the Topo Athletic MTN Racer 4 fit wide feet?

Toebox width has not been measured in the lab yet.

What is the drop on the Topo Athletic MTN Racer 4?

5 mm, with a 34 mm heel stack and 29 mm forefoot.

Is the Topo Athletic MTN Racer 4 good on wet rock?

Lab traction has not been measured for this model yet.

Manufacturer specs · Retailer listing

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Image: Running Warehouse product photo

Specs: manufacturer. Verified Sep 4, 2026.

Report inaccurate data: hi@pr.run. Data sources.

Topo Athletic MTN Racer 4 Review, Specs, and Fit (2026) | PR Run