6 Best Running Shoes For Spartan Race (OCR) in 2026

How we test running shoes for spartan race (OCR)

While we’re very outdoorsy and love abusing shoes on the trails, you won’t see us recreationally doing a barbed-wire crawl with 10k-volt live wires, like the ones used in Tough Mudder, only to tell you how the shoes performed. We actually test the shoes in various conditions: dry, wet, and very wet. We also test the shoes in the mud, on wet grass, over rocky patches, and while scrambling. 

Then, we take the shoes to the lab. We follow different standards to make sure every shoe is treated the same. This makes our test results comparable across the whole category. We measure the traction and the lug depth because during Spartan races, your shoes need to claw into mud and not keep sliding. We measure the durability of the toebox and the outsole because the shoes should last and not get ripped or destroyed during the race (and we know how harsh the obstacles can be). 

We also measure the stack heights, shock absorption, energy return, weight, to name a few. Some of these tests have to be done on shoes cut in half lengthwise or on shoes with their uppers removed. We do that too. And we have no regrets because that’s what it takes in order for the measurements to be accurate.

First Spartan race? This what to get: 

An old pair of trail running shoes. Don’t buy new shoes until you know whether you want to keep doing Spartan races. 

Extra tip: the course is rough, so go as light as possible. That means that all the unnecessary things that can end up in mud will end up in mud (car keys, wallets, earbuds, sunglasses, etc.).

7 features to look for in Spartan shoes

Spartan shoes have to be comfortable and provide a good lockdown. Some features, like cushioning, depend on the length of the race. Here’s an overview: 

1. Very good grip! It’s odd because the shoes are supposed to claw through mud but also stick to the obstacle surfaces. It’s 2 very different things when it comes to grip. To dig deeper, we use our lug depth and traction lab tests.
2. Durability is a must! It’s not just about these shoes lasting more than 1 race, but also about the durability of the outsole, which, if not durable, will prematurely end up with flattened lugs. A non-durable upper may expose your toes or instep to different obstacles that may cut or bruise your skin. 
3. Do not get Gore-Tex (waterproof) shoes! Spartan shoes need to drain quickly! 
4. It’s best when the shoes weigh less than more. It’s a compromise between getting more cushioning and rubber coverage, and less weight. 
5. You may get to carry 30kg buckets over uneven terrain: stability is a must! 
6. Superb lockdown is needed. First, because it will make you cruise the course and obstacles with confidence. Second, you won’t get any blisters due to sliding within the shoe or cramped toes. Third, you won’t lose shoes in the mud. Fourth, it’s also important to nail the lockdown even if you decide to go half a size up (for swelling). 
7. Trail running shoes do not have any rope-climb features. If this is your worry or a priority, you need to look for Spartan-specific shoes. 

Whatever you do, remember: do not wear brand new shoes on race day. 

Mud wants claws, walls want glue: the issue with grip in OCR shoes

You can dig into the mud, or you can stick to the walls. Doing both well? Highly unlikely. 

Basically, OCR shoes need a different type of grip for mud and for obstacles. Trail running shoes that excel in mud have very deep (4 mm and deeper) and aggressive lugs with quite some room between them. This room is needed for mud shedding. 

On the contrasting side, the obstacles are made of smooth and wet metal, wood, and plastic, so you should rely on the rubber compound (must be grippy) and ideally good ground obstacle contact. In this case, we refer to our traction test!

We perform this test on wet concrete and the result is a so-called dynamic coefficient of friction. The higher it is, the better! For wet-only surfaces, we recommend finding trail shoes with a CoF of 0.45 and higher. 

Finding durable OCR shoes using lab data

OCR shoes are really another level. You never know what you may encounter on the trail and the shoes have to endure it all. Let’s start with the outsole durability. 

We use a Dremel and try to intentionally damage the outsole. The test parameters are always the same, so each shoe gets the identical treatment (which is why the results are comparable, yes!).

The bigger the dent = the less durable the outsole. 

When it comes to the toebox durability, in most shoes our Dremel actually touches the upper, not the toe bumper. This is great because we’re actually testing the upper then. And upper gets insanely abused: different obstacles punch it or scratch it and, on top of it, when you climb the rope, regardless of whether you’re using a J hook or an S wrap, the rope rubs the upper (and the laces, and the medial side of the midsole). 

Given the material type, we can’t use a tyre tread gauge here, as we do when testing the outsole durability. So, we assess the damage on a 1-5 scale, where 1/5 is the least durable and 5/5 the most.

Bonus tip: After the race, you may reach for aggressive detergents or very high pressure to clean your shoes. Remember to be gentle because you may destroy the glue or worsen the overall shoe condition. 

Fast drainage is a must 

Getting wet is mandatory; no burpee will get you out of it. So you want shoes that let the water out quickly. Here’s how to go about that: 

1. Some shoes have drainage holes. Those come in handy! 
2. Look for shoes with a high drying potential (use our lab data to filter for this).
3. Look for shoes with less padding. The thicker the tongue and heel, chances are, the longer they need to dry. This is quite the compromise to make, as some Spartans prefer more padding because it means more comfort or a better heel lockdown. That’s on you to decide what you’ll prioritise. 
4. Thinner uppers, thinner midsoles. 
5. Do not use Gore-Tex shoes. 

While measuring breathability using our climate-controlled chamber, we also measure drying potential during those 3 hours. 

Drying potential actually tells us how much moisture the shoe evaporated through its materials. Breathability, on the other hand, tells us how good the shoe is at moving the sweat away from the skin. Naturally, you’d want both of these to be high. 

Spartan shoes must be stable (and stack height may vary)

Buckle up, there’s a lot to cover here. Stability is not as straightforward as, say, longitudinal flexibility. Many factors are at play. Let’s dissect it: 

1. We have to look at the stack heights. Higher platforms are kinder to our feet because they offer better shock absorption. But, higher platforms can get unstable easily. Even if you tried the shoes and liked them, keep in mind that you will be carrying extra load (bucket carries and sandbags) under which shoes may behave differently, especially when you load them unevenly (due to hopping or running on uneven or slippery terrain). 
2. Midsole softness: if the foam is very soft, high-stacked shoes need to make the platform wider (but not too wide because chunky shoes are not agile enough for Spartan racing) or add a plate. Carbon-fibre plates make the shoes stiffer, and you want them flexible. There’s a trade-off at every step. 
3. Torsionally rigid shoes can feel much better on technical terrain (think sharp rocks or large roots) than shoes that you can twist easily. 
4. Lateral stability matters. Your landings should feel planted. 

Stack height 

In the lab, we use a digital calliper to measure the forefoot and the heel stack height. We do this according to the WorldAthletics guidelines, meaning the measurements are done at 12% and 75% of the inner shoe length.

It’s on you to choose what feels and works better for you. Keep in mind that we always include the lug depth in the stack height (and insole). 

Midsole width 

If you’re going for higher midsoles, it’s good to check their midsole width to make sure they are not too narrow. In the lab, we measure the midsole width both at the heel and forefoot, so you can look for planted landings exactly where you land. 

Midsole softness

Another thing to examine is the midsole softness. Some competitors simply enjoy a softer feel, while others take advantage of the extra stability that comes from firmer foams. 

For this test, we have to cut the trail shoes in half first. This gives us direct access to the foam. Any other way of doing this (on the outer side) gives wrong results. We stick a needle of an Asker C durometer into the foam and look at the numbers on display: the higher they are, the firmer the foam. 

Torsional rigidity 

Imagine stepping barefoot on the edge of the rock. Your foot can’t stay flat; it naturally flexes and balances. Normal behaviour. Now imagine doing that with shoes on. Shoes can also bend, or they can stay rigid. When you keep running over technical terrain, covered with differently shaped obstacles, torsional rigidity makes your feet compensate for the unevenness less by keeping the platform more flat and less twisted. This will tyre your feet less. 

We use this machine to test the torsional rigidity and come up with 1 single metric given in Nm. The higher the test result, the more rigid the shoe (more difficult to twist). 

When do energy return and shock absorption matter most in OCR races?

Spartan shoes can be quite low to the ground. The lower they are, the lower the shock absorption. Is that an issue? Depends. 

Shock absorption and energy return matter a lot over longer distances. The more you get tired, the more you’ll appreciate the leg-saving features: a combination of good (high) shock absorption and energy return. High shock absorption means the midsoles are capable of dealing with a huge chunk of the impact forces, so less stress is sent to your legs. High energy return means a lively ride, and if you prioritise speed, this is a feature to look for. 

In the lab, we perform a test during which we measure both shock absorption and energy return. As mentioned above, you’d want both to be high. However, lower shock absorption is normal in low-stacked running shoes, so if you’re doing Spartan races in, say, 20-25mm shoes, do not expect high shock absorption. 

But such shoes may work for you because they are lightweight, very good for ground feel and proprioception, and the shorter the distance, the smaller the chances of needing something higher stacked. 

If you’re a heavy runner, we recommend looking for shoes with shock absorption that’s moderate to high (meaning it scored higher than 110 SA). If propulsion is your #1 prio, look for energy return higher than 65%. 

Spartan shoes should be flexible 

When we say that OCR shoes should be flexible, it may sound odd to you if you’re coming from road running and know that very fast shoes are often quite stiff (thanks to premium foams combined with carbon plates). However, trail running and, specifically, obstacle course running, is very different. 

While climbing the wall (any, but we know there are different types in a Spartan race), you need a flexible shoe that will help you climb faster. Imagine climbing up the wall using very stiff shoes! Also, in muddy areas, you can dig the forefoot deeper into it when the shoe allows you to (it flexes naturally with your foot). 

In our lab, we measure the stiffness of the shoe by clamping the forefoot in place, adjusting the heel for the forefoot rocker, and then bending the shoe to 30 degrees. We measure the force needed for that action. More force = stiffer shoes

This longitudinal stiffness is different from torsional rigidity that we covered in the section on stability above. 

How lightweight can Spartan shoes be?

When doing Spartan races, you need to count on getting wet and muddy. When that’s the case, it’s important that you have as few things as possible on you. And for those things that you are wearing, they should be lightweight. The less material there is = the fewer things that can get wet, get soaked, keep you cold, or weigh you down. 

Naturally, this means looking for trail shoes that are as lightweight as possible. (Keep in mind that lightweight running shoes may offer less protection, less cushioning, less rubber coverage.)

If this is what you’re after, here are the weights of Spartan shoes (sorted by the lightest), including brand's spec and lab data: 

Heel drop in OCR shoes and why it matters

We’ve covered stack heights in the stability section above. Heel drop is calculated by subtracting forefoot stack height from the heel stack height. It tells us how steep (sounds like an exaggeration) the platform is. 

Heel-to-toe drop is quite important, especially if you’re used to running in, say, 10mm-drop shoes, and suddenly someone recommends a zero-drop Altra to you for your next race. Here are a few very important bullets regarding heel drop: 

• Sudden changes in heel drop may cause strain, discomfort, and even injury. By sudden, we mean anything more than 4 mm, either way (from lower to higher and vice versa).
• Trail running shoes have an average heel drop of 7.3 mm. Check the running shoes you’ve got and take the heel drop into account when making a change. Going from 7-8 mm to 0 mm just because someone said the shoe is good is risky. 
• Many runners actually have shoes with different heel drops in their rotation. This is generally a good idea because it helps strengthen different muscles: the lower the drop, the lower the muscles used, so in zero drop it’s the foot muscles that work the most. In very high-drop shoes (say 10mm and higher), your hip muscles are utilised a lot. 
• If you had or still have a leg injury, depending on where it is, you can choose running shoes with a heel drop that’s kind to that area. Or you’re entirely healed and up for some strengthening. Take it easy and use the heel drop that aims at that area.
• Changes in heel drop are possible but need to be gradual. 

This topic is covered in great detail in our Ultimate guide on heel to toe drop. 

Extra room in Spartan shoes (to swell or for wider feet)

Some people will tell you to get shoes that are half a size or even a full size larger than you actually need. Here’s why that may (not) work and a few general notes on the sizing: 

1. If doing shorter distances, your feet may not swell as much or at all.
2. Our feet get swollen on longer runs/efforts and it’s when the extra room is appreciated.
3. Some of that extra room can be achieved with uppers that have give. 
4. On the downside, non-structured uppers or shoes that are too large may also mean you can’t achieve a good lockdown. Your feet can slide side to side or forward and back, or you may end up cinching the laces so hard you get a lace bite. 

On the bright side, we make gel casts of shoes’ interiors in our lab by pouring a liquid into the shoes and freezing them together. Once the gel has hardened, we take the cast out and start measuring. 

First, we measure the shoe width and the toebox width. Doing the measurements this way allows us to work with realistic numbers: how much room there is on the inside. It’s incomparably more accurate than doing the measurements on the outside using a calliper because those numbers include a varying upper thickness and various protective overlays. 

If your big toes are pointing up or you have high-volume feet, which ends up in black toenails because the upper keeps pressing on them from above, you need a high toebox. 

1 shoe can't excel at everything

If we’re talking about Spartan races, there are different formats. Those formats vary in distance, terrain, and, well, obstacles. From Sprint, only a 5K run, to an ultra, which sits at 50K. From gravel roads and mostly flat muddy patches to demanding elevation gain under extreme weather. From rope climbs and bucket carry to barbed wire crawl and slip walls. No shoe on Earth could excel at all of those! 

As mentioned above, 1 shoe can’t excel at everything because of the grip. Spartan races ask 2 very different things of shoes: to claw through mud and to cling to slippery surfaces. Trail shoes can be very good at one of those. 

Getting injured at Spartan races or OCR

Overall injury rates during Spartan races are low but not trivial. Rabb and Coleby, who were actually members of the Spartan’s medical team, looked at 33 OCR events and 73,366 participants, and found that 1782 injuries occurred over 3 seasons. That’s a 2.4% injury rate, where 93.9% of injuries were treated on site. 

A review from 2025 looked at Spartan and Tough Mudder races and found that 27% of participants self-reported at least one extremity injury, with ankle and knee injuries being the most common. 

If you’re running longer distances (like 13 km Super or longer), keep in mind that leg stability significantly decreases, as Rey-Mota et al. have shown. This means extra stability in the running shoes can bring a lot to the table in the final kilometres. 

If you’re preparing for your first Spartan race, you should also know that the best individual predictors are mean relative power from the Wingate test and mile-run time (Titus et al.). 

Regarding the Tough Mudder’s electrical obstacle, with 10,000 volts crackling through a field of wires, if it does not sound dangerous enough, we recommend reading this study. The story follows 5 cases only, so it’s about what can happen, not how often. Better to be informed, still. 

Can you wear cross country shoes during Spartan races? 

Yes, if that’s what you’re looking for: very low stack heights and overall an aggressive design. Cross country shoes are lightweight and often very breathable. Keep in mind that due to the aggressive design, these may work for very short distances (Sprint discipline), they may put pressure on your toes, and you should choose flat design (no spikes). 

Why do people pay for Tough Mudder only to suffer?

Scott, Cayla, and Cova did extensive interviews with Tough Mudder participants and found a few recurring motives to join these races: 

• It’s a good escape from the boring office work, where hours are spent in front of the laptop. 
• The pain (usually related to shocks and icy water) gives participants temporary relief from the burdens of self-awareness. 
• It’s teamwork, so while the participants may feel isolated in their daily lives, they feel the power of the team when racing. 

We don’t know what your reasons are for joining an OCR, but we want you to be safe and happy with your shoe choices. Let’s hope this guide has achieved that, in terms of showing you what to pay attention to and offering the best performers to look at.