Rugged grip and roomy toes, but a snugger fit
Quick Answer: Topo Athletic MTN Racer 4 Review: The Topo Athletic MTN Racer 4 is a rugged trail shoe for people who want a roomy, foot-shaped toe box without giving up grip. It has a Vibram Megagrip outsole, a low heel-to-toe drop and a tough, abrasion-resistant upper. This version fits snugger and rides firmer than the one before it, and it can feel tight for high-volume feet. It suits wide forefeet on rough, rocky ground better than fast, light running or easy trails.
The Topo Athletic MTN Racer 4 is the brand’s most rugged trail shoe, built for long days on rocky, technical ground. Most trail shoes taper at the front, which gets uncomfortable when feet swell on a long outing. Topo shapes the toe box like a foot instead, so toes can spread while the sole still grips.
The fourth version tightens up the fit. Topo reworked the upper with a tightly woven, abrasion-resistant mesh and a higher heel counter, and it added a hook-and-loop gaiter system. The midsole foam is the same ZipFoam used in the MTN Racer 3, so the ride feels firmer than a plush trail shoe. It is a protective, stable shoe, not a soft, bouncy one.
Topo Athletic MTN Racer 4 trail running shoe, side view. Image: Amazon
Specs
Here are the specifications for the Topo Athletic MTN Racer 4:
| Type | Rugged trail running shoe |
| Best for | Long trail days, rocky and technical ground, wide forefeet |
| Midsole | ZipFoam, the same foam as the MTN Racer 3, with an FKT insole that uses TPU beads |
| Stack height | 33 mm at the heel, 28 mm at the forefoot |
| Heel-to-toe drop | 5 mm, so the heel sits only a little above the forefoot |
| Upper | Tightly woven, abrasion-resistant mesh with a higher heel counter and a hook-and-loop gaiter system |
| Outsole | Vibram Megagrip rubber |
| Fit | Snugger than the MTN Racer 3 with a wide toe box |
| Price | Check latest price |
Pros
- The wide, foot-shaped toe box lets toes spread, which helps on long descents and swollen-foot days.
- Vibram Megagrip rubber grips well on wet rock and loose ground.
- The tightly woven upper resists scrapes from rocks and brush.
- A higher heel counter and snugger fit hold the foot more securely than the MTN Racer 3.
- The 5 mm drop sits between a standard trail shoe and a zero-drop shoe.
- A gaiter system helps keep grit and small stones out.
Cons
- The ZipFoam midsole rides firmer than the MTN Racer 3 did, so it is less plush than many cushioned trail shoes.
- Published weigh-ins put it heavier than the MTN Racer 3.
- The snugger fit and woven upper can feel tight on high-volume feet, even with the wide toe box.
- The tightly woven mesh is tougher than airy, so it runs warmer than a thin upper.
- It is more shoe than you need for smooth trails or easy, short runs.
What changed from the MTN Racer 3
Topo kept the foam and changed the shape and the materials around it. The midsole is still ZipFoam, so the cushioning feels familiar. The upper is now a tightly woven, abrasion-resistant mesh, the heel counter is higher and the whole shoe fits snugger. A hook-and-loop gaiter system is new, and the Vibram Megagrip outsole carries over.
If you liked the roomy, relaxed feel of the MTN Racer 3, try the fourth version on first, because the snugger fit changes the character. If you wanted a more secure hold and a tougher upper, this is the update you were waiting for.
Who should buy the MTN Racer 4
Buy it if standard trail shoes cramp your toes. Forefoot squeezing causes blisters and bruised toenails on long descents, and the wide front here is the main reason to choose Topo.
Buy it if your trails are rocky and rough. The Vibram grip and tough upper make sense on technical ground, and the firmer foam gives a stable, protected feel.
Buy it if you want a lower-drop shoe without going fully flat. At 5 mm you stand closer to level than in most trail shoes, but the change is gentler than a zero-drop switch.
Who should probably skip it
Skip it if you have narrow feet, because a wide toe box leaves too much room up front for a secure hold on technical ground. Skip it if you have high-volume feet or like a roomy fit through the whole shoe, since the midfoot and upper are snugger than before. And skip it if you want a soft, bouncy ride or the lightest shoe possible.
These shoes may suit you better:
- Altra Lone Peak 9: a wider, zero-drop, foot-shaped trail shoe for runners who want even more room (check price | read review)
- Hoka Speedgoat 7: a softer, more cushioned trail shoe with aggressive lugs for runners who want protection over toe room (check price | read review)
- Saucony Peregrine 16: a lighter, more agile trail shoe for quicker runs on technical ground (check price | read review)
Not sure which kind of trail shoe fits you? Our Free Shoe Finder can help you narrow the choices.
Fit and feel: snug through the heel and midfoot, wide at the toes
Published reviews describe the MTN Racer 4 as true to size and snugger than the MTN Racer 3, with a wide toe box at the front. Start with your usual size and leave a thumb’s width of space in front of your longest toe, because feet swell on long days and downhill running pushes them forward. Topo also makes a wide version, which is worth a look if your whole foot runs broad.
The higher heel counter and tightly woven upper give a secure hold. That is good news if you found earlier versions sloppy. It can also feel constricting on high-volume feet, so try it on late in the day if you can.
Topo Athletic MTN Racer 4 trail running shoes, pair on a rock. Image: Amazon
How the ride feels: stable, protective and firm
The midsole uses ZipFoam with an FKT insole made with TPU beads. In plain terms, the foam is firmer than the soft, bouncy foams on many modern trail shoes. That gives a planted, stable feel on uneven ground. You feel the trail more than you float above it.
The 33 mm heel and 28 mm forefoot stack is moderate for a trail shoe, and the 5 mm drop keeps the heel only slightly higher than the forefoot. Shoes with a lower drop load the calf and Achilles more, so build up gradually if you are coming from a higher-drop shoe.
The shoe is neutral, with no built-in correction for how your foot rolls. Its steadiness comes from the wide, low platform rather than from a stability frame.
Topo Athletic MTN Racer 4 trail shoe from a different angle. Image: Amazon
Grip and durability: Vibram Megagrip
The outsole is Vibram Megagrip, a rubber known for staying tacky on wet rock and roots. It bites on loose stones and handles mud well without being a mud specialist. The tightly woven upper is built to resist abrasion, so the shoe should hold up on rough, scrubby ground. As with all running shoes, the 300 to 500 mile range is a broad guideline, and trail conditions change it. Rinse mud off and let the shoes air dry away from direct heat.
Is the MTN Racer 4 good for walking and hiking?
For hiking, yes. A wide toe box helps on long downhills, where toes push forward. The Vibram grip and protective upper cover most of what a light hiking shoe offers. The firm ride is stable on uneven ground.
For pavement walking and standing all day it is less ideal. The lugs do not add much on hard flat ground, and a lower drop asks more of your calves than a cushioned walking shoe. Our guide to the best walking shoes covers better everyday picks.
Topo Athletic MTN Racer 4 Alternatives
If the MTN Racer 4 is close but not right, these are worth comparing.
The Topo Athletic Terraventure 5 is a softer, more everyday trail shoe from the same brand with a roomy toe box (check price | read review).
Brooks Cascadia 20 is a protective, stable trail shoe with a more conventional fit (check price | read review).
Hoka Challenger 8 is a softer, lighter shoe that works on gentler trails and on the road (check price | read review).
Price and value
Topo’s price for the MTN Racer 4 is in the mid-range for a rugged trail shoe. What you pay for is the shape and the build: a foot-shaped toe box, a Vibram outsole and a tough upper. If forefoot room is a problem you really have, that is money well spent, because few trail shoes offer it. If standard trail shoes already fit, you can find similar grip with more cushioning elsewhere.
Final verdict
Best for: runners and hikers with wide forefeet on rocky, technical or long trails who want room at the front and grip underneath.
Avoid if: you have narrow or high-volume feet, you want a soft, bouncy ride or the lightest shoe possible.
Fit: true to size, snug at the heel and midfoot, wide at the toes.
Verdict: The Topo Athletic MTN Racer 4 is a tough, grippy, foot-shaped trail shoe that fixes the loose hold of earlier versions. It is firm and not the lightest, but for wide feet on rough ground it offers something few trail shoes do.
Check the latest price on the Topo Athletic MTN Racer 4.
Frequently Asked Questions for Topo Athletic MTN Racer 4
No. It has a 5 mm drop, which means the heel sits slightly higher than the forefoot. That is lower than most trail shoes but not flat. Topo makes other models with different drops.
Published reviews generally report it fits true to size. The toe box is wide, but the heel and midfoot are snug, so sizing up adds length you probably do not need.
The midsole foam is the same ZipFoam, but the fourth version has a snugger fit, a tightly woven abrasion-resistant upper, a higher heel counter and a hook-and-loop gaiter system. It rides firmer than a soft trail shoe.
No. It is a breathable mesh trail shoe, not a waterproof one. It will let water in on stream crossings, and it is built to drain rather than keep water out.
Yes, published reviews report a wide version is available in addition to the standard fit. Check current listings for sizes and colors.
Yes. The wide toe box, Vibram grip and tough upper work well on long hikes and rocky descents. It is a trail runner that hikes well rather than a heavy hiking boot.
