I was excited to try the Merrell MTL SpeedArc Peak. This is a $290 carbon-plated trail racing shoe developed through the Merrell Test Lab over five years. Merrell says 154 prototypes covered more than 13,000 testing miles before the final version launched in July 2026. That’s wild!
The MTL SpeedArc Peak combines PEBA-based FloatPro racing foam, a firmer FloatPro base, a forked Carbon Fiber FlexPlate, 4 mm Vibram trail-racing rubber, and a Matryx upper reinforced with Kevlar threads. It also sits lower than many current trail super shoes at 30 mm in the heel and 24 mm in the forefoot. In a world of super high stack heights, this is definitely different.
At $290, this is a race shoe…it’s one of the more expensive shoes on the market and I would save it for faster trail running, race-specific workouts, and race day rather than putting a pile of easy miles on it.
Quick Facts
- Weight: 10.75 oz / 305 g per shoe
- Stack height: 30 mm heel / 24 mm forefoot
- Drop: 6 mm
- Lug depth: 4 mm
- Price: $290
- Best use: Trail racing and fast trail workouts
Before Trying the Merrell MTL SpeedArc Peak, I Had a Few Questions
Does the Merrell MTL SpeedArc Peak fit true to size?
Yes, once you account for the unisex conversion. The fit is race-focused and fairly snug through the forefoot. Merrell currently offers only a medium width.
Is the Merrell MTL SpeedArc Peak good for wide feet?
I would be cautious if you regularly need a wide shoe. Runners who prefer a lot of room in the toe box may be happier in another trail racer. The Merrell MTL SpeedArc Peak is actually good for women with wide feet because it is unisex sizing, but if you wear a 2E or 4E, it may feel too narrow.
What distances is the Merrell MTL SpeedArc Peak best for?
I see the sweet spot from shorter trail races through roughly 50K, depending on the course. The lower stack, forked carbon plate, and 4 mm lugs favor races where you can keep moving quickly. For very long ultras where cushioning is the priority, I would choose something with more foam underfoot.
Can you use the Merrell MTL SpeedArc Peak for easy runs?
Yes, although the Merrell Agility Peak 6 is a better choice for regular trail mileage. I would save the SpeedArc Peak for workouts and races.
Can you use the Merrell MTL SpeedArc Peak for workouts?
Yes. Faster trail workouts are one of its strongest uses. The PEBA-based upper foam and Carbon Fiber FlexPlate are designed around energy return and efficiency, while the forked construction allows the forefoot to adapt more independently on uneven terrain.
Is there a previous Merrell MTL SpeedArc Peak?
No. This is the first SpeedArc Peak. The MTL Skyfire 2 Matryx is the closest earlier Merrell race shoe, although it is lower, lighter, and more focused on steep mountain racing.
Merrell MTL SpeedArc Peak Upper and Fit
The upper is Matryx, which has become common in premium trail racing shoes because it can stay thin while keeping structure around the foot. It’s also not cheap and drives up the cost of shoes. Merrell combines multi-filament Kevlar threads with high-tenacity polyamide in a single-layer construction. There is also a breathable mesh lining, padded collar, elastic lace keeper, TPEE footbed, and recycled laces.
This is a very race-specific upper. There is less bulk than you get from the Merrell Agility Peak 6, and the material is built to keep the foot secure when terrain changes quickly. The thinner construction also keeps the shoe from feeling like a traditional, heavily protected trail trainer.
In all, I find the Merrell MTL SpeedArc Peak to be very comfortable and breathable. It’s been fairly hot and having a breathable shoe is a must. I haven’t gotten any hot spots or blisters.
The SpeedArc Peak is currently offered only in medium width, and the forefoot is more tapered than many trail shoes. Women may find it a bit wider of a shoe then they are used too due to it being unisex.
Because this is unisex sizing, double-check the conversion before ordering. Merrell bases the sizing on men’s sizes, so a women’s size 11 converts to a unisex 9.5. I found the conversion fine and didn’t have any issues.
Merrell MTL SpeedArc Peak Midsole and Ride
The midsole is the most interesting part of the SpeedArc Peak. Merrell calls it the SpeedARC Midsole System. A PEBA-based FloatPro racing foam sits closer to the foot, a more durable FloatPro foam forms the base, and the Carbon Fiber FlexPlate sits between them.
The plate is forked rather than a solid slab of carbon across the forefoot. Each side can move with more independence on uneven ground. Trail racing creates a different challenge than road racing because the left and right sides of the shoe are rarely landing on identical surfaces. Rocks, roots, slanted trail, and quick direction changes all ask more from a carbon plate than a straight stretch of pavement. Merrell’s forked design is intended to account for that. A long time ago, someone told me that carbon plated trail shoes didn’t matter as much if the terrain was super technical…that makes sense!
The SpeedArc Peak also avoids the huge stack heights now common in trail super shoes. At 30 mm in the heel and 24 mm in the forefoot, there is still plenty of trail feedback underfoot. You get PEBA and carbon technology without placing the foot around 40 mm above the trail.
That gives it a different character from the Hoka Tecton X 3. The Hoka uses a taller platform and more cushioning for long trail races. The SpeedArc Peak keeps you closer to the ground and is aimed more toward runners who want trail feedback with their race foam.
For smoother dirt, gravel, and runnable singletrack, the PEBA layer has more opportunity to contribute. Once the terrain gets very slow and technical, any carbon trail shoe loses some of the advantage you are buying it for. The SpeedArc Peak is is best on a course gives you opportunities to actually run fast like well groomed trails.
Merrell MTL SpeedArc Peak Outsole
Merrell uses Vibram trail-racing rubber with 4 mm lugs. The rubber is placed in targeted sections instead of covering the full bottom of the shoe, leaving portions of the SpeedARC construction exposed. I kind of wonder how that is going to affect the durability of the shoe.
Four-millimeter lugs give the SpeedArc Peak a useful middle ground for racing. They are substantial enough for dirt, loose trail, wet rock, and moderate technical terrain without making the shoe overly aggressive on hard-packed sections.
The exposed sections are one reason I would not use the SpeedArc Peak as a daily trail trainer. Sharp rock and repeated rough use can wear exposed foam faster than a fully covered outsole. At $290, I would rather save the shoe for fast days and racing. I anticipate the Merrell MTL SpeedArc Peak is probably going to last 100-200 miles at the most…that’s a lot for a carbon plated shoe but not a lot for a trail running shoe.
Merrell MTL SpeedArc Peak vs. MTL Skyfire 2 Matryx
There is no previous SpeedArc Peak, so the MTL Skyfire 2 Matryx is the closest reference inside Merrell’s race lineup.
The Skyfire 2 Matryx has a 25 mm heel, 19 mm forefoot, 6 mm drop, and 5 mm lugs. It is also far lighter by published weight and is designed around vertical mountain racing.
The SpeedArc Peak adds more cushioning, PEBA-based racing foam, the newer forked Carbon Fiber FlexPlate, and 4 mm lugs. If I were lining up for a short, steep mountain race, the Skyfire still has appeal. For a longer race with runnable singletrack, gravel, climbing, and descending, I would choose the SpeedArc Peak.
It is less of a replacement for the Skyfire and more of an expansion of Merrell’s trail racing lineup.
Merrell MTL SpeedArc Peak vs. Hoka Tecton X 3
The Hoka Tecton X 3 is the closest outside comparison. Both shoes use Matryx uppers, PEBA foam, carbon technology, 4 mm Vibram lugs, and premium trail-racing construction. The Tecton X 3 uses two parallel carbon plates with winglets and has a 5 mm drop. The Hoka gives you more cushioning for long races. The Merrell keeps you closer to the trail.
I would choose the Tecton X 3 for a long, runnable ultra where I wanted more foam underneath me. I would choose the SpeedArc Peak for a faster race with technical terrain and frequent changes in direction.
The SpeedArc Peak costs $290, while the Tecton X 3 originally retailed for $275.
Where Does the Merrell MTL SpeedArc Peak Fit in My Rotation?
The SpeedArc Peak is what I would pull out when I want a lower trail race shoe with modern racing foam and carbon technology. Think faster trail races, technical 10Ks, half-marathon-distance trail races, and 50Ks with a lot of runnable terrain. I wouldn’t use it for easy runs. When on fast, runnable trail, it does feel fast.
Who Should Buy the Merrell MTL SpeedArc Peak?
- Trail runners looking for a premium carbon-plated racing shoe
- Runners racing shorter trail distances through roughly 50K
- Runners racing on runnable trail terrain
Who Should Skip the Merrell MTL SpeedArc Peak?
- Anyone looking for an inexpensive daily trail trainer
- Runners who prefer max-cushion trail shoes for ultras
- Runners who spend most of their time in deep mud
Merrell MTL SpeedArc Peak Conclusion
The Merrell MTL SpeedArc Peak is one of Merrell’s most ambitious trail running shoes. Five years of development, 154 prototypes, a three-part SpeedARC midsole, PEBA-based FloatPro foam, a forked carbon plate, Matryx upper, and Vibram outsole put a lot of high-end components into one shoe.
I like that Merrell did not simply copy the high-stack formula used by several other trail racers. The 30/24 mm platform gives the SpeedArc Peak its own place among carbon-plated trail running shoes. It stays closer to the trail while still adding modern racing foam and carbon technology.
For a runner who wants a premium trail racer for technical courses that still include enough runnable terrain to take advantage of PEBA foam and carbon propulsion, the Merrell MTL SpeedArc Peak is one of the more interesting new trail shoes of 2026.
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Questions for you:
What is your favorite trail running shoe?
Have you tried the Merrell MTL SpeedArc Peak?