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Mtl Long Sky 2 Trail Running Shoe - Men's

4.246376811594203 out of 5 stars
69 Reviews


Size Chart


Why We Like The Merrell Mtl Long Sky 2 Trail Running Shoe

When regularly clearing double-digit miles on trail, we rely on the Merrell Mtl Long Sky 2 Trail Running Shoe to keep our feet and stride happy. The reinforced mesh upper lets our feet breathe easy and dries off quick after bounding through mud and rivulets, while the Vibram Megagrip sole keeps our strikes and toe offs secure with its sticky rubber compound and earth-eating lugs. As we stride from valley to ridgeline and back, the internal bootie keeps our foot comfortably locked over the platform's plush foam that keeps the ground feeling soft no matter what's underfoot.


  • High-performance running shoe for your long trail runs
  • Reinforced mesh upper is breathable and durable
  • Reflective details increase your visibility in low light
  • Integrated D-ring for attaching gaiters (sold separately)
  • Internal bootie construction provides a locked-in feel
  • 4mm drop encourages a natural gait and midfoot strike
  • FloatPro Foam is light, shock absorbing, and energy returning
  • Vibram Megagrip sole delivers reliable trail traction on varied terrain
  • Item #MERZ2OG
Upper Material
mesh, TPU
FloatPro Foam (EVA based)
Vibram Megagrip, 5mm lugs
Support Type
Heel / Forefoot Height
23.5 / 19.5mm
Claimed Weight
[single] 9.45oz
Manufacturer Warranty
limited 1 year
trail running

Overall Rating

4 based on 69 ratings

Review Summary

1 Stars - 2 reviews
2 Stars - 4 reviews
3 Stars - 8 reviews
4 Stars - 16 reviews
5 Stars - 39 reviews

What do you think about this product?


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5 out of 5 stars

June 10, 2024

Love this shoe.

Fits well and true to size. Comfy with nice arch support.

Rob K

Originally reviewed on Merrell

5 out of 5 stars

May 22, 2024

More greatness from Merrell

Absolutely love my Merrells, as usual. Hold up well to the elements and work abuse, but still provide fabulous support as well. Rock on!

John B.

Originally reviewed on Merrell

5 out of 5 stars

April 27, 2024

Great Shoe!

Best shoe I’ve ever owned. Outdoor guy. 56 years old

Pat T

Originally reviewed on Merrell

4 out of 5 stars

April 26, 2024

Great trail runner for steep hills and muddy trail

I ran in Bare Access Trails and XTRs for a long time before switching to Altras when those were phased out. I decided to try these to get some added traction and security on single track and am glad that I did. Midfoot lockdown is great and the toe box is just roomy enough for comfort but not so much that you slip around on descents or anything like that. The heel feels a bit wide, but using a runner's loop on the laces takes care of any slippage. The trails I run in can get very muddy and the outsole has been up to the task so far. I feel a lot more secure than I did in Altras. They also drain very well. If the toebox was a bit roomier and the heel a bit more secure, these would be perfect.


Originally reviewed on Merrell

4 out of 5 stars

April 18, 2024

Solid Grip and light weight

My first two runs with these sneakers, i did not like them. My feet hurt as they were not used to the minimal cushion trail sneakers offer. That said, I trained for six months in the trails, all of my long runs in these sneakers. I trained for a trail 100k. My feet strengthened as I got used to the sneakers. I ran a 50k in snow, rain, mud, and dry conditions. They provided amazing traction in the snow, 4-6 inches, the dirt and helped with mud but would still slip for softer ground. I did not try them on gravel or rocky type technicality. The sneakers are light weight with a firm vibram sole to help provide some support. My only complaint, as I've seen on others, is the mesh toe box is starting to tear on the outside of the foot, right where the sneaker creases. Other than that, my 420 miles have provided to be safe, grippy, and successful. I paired these sneakers with Aonijie toe socks and finished my 100k with no blisters!


Originally reviewed on Merrell

4 out of 5 stars

April 12, 2024

First thoughts 20 miles.

First runs it’s a solid shoe. In the first three runs I’ve thrown about everything but snow and deep mud. Handles great, breathes/drains well, and really grips on to most everything. The fit around the midfoot is nice and snug, while still having plenty of wiggle rooms at the toes. I’ve not tested the toe bumper yet but there is one. It does not to seem as robust as that on a cascadia but different style shoe. This is going on the the list of racing trail shoes for me. I’m a fairly average front middle pack runner. Biggest concern I have is durability. The lugs will be fine, not sure about the upper. Time will tell. Typically I get 600+ miles out of any shoe, so lets see how it goes!

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Originally reviewed on Merrell

3 out of 5 stars

March 29, 2024

Great fit, but the tongue and bootie let it down.

A very firm ride is good on technical and soft trails. Not necessarily the best for mixed terrain that may include asphalt. Fit: (+) Nice wide toe box for those who prefer that (like me). Easy to feel secure and locked down. (-) Bootie fit. The bootie is significantly too tight in this shoe. It is both too small and to stiff of a material. No matter how loose the laces are, the shoe is just too tight over the top of the foot causing numbness to set in after a very short period of time. The Tongue: Merrell got this very wrong here. The tongue comes too far up into the curve of the ankle and is combined with an edging material that stretches less than the bootie causing it to curl downwards toward the foot. This causes the top of the tongue to dig into the foot/ankle junction. I found this very uncomfortable. Modifications are in order: Thankfully the material and construction of this shoe lend itself to easy modification. I trimmed the tongue back considerably to provide adequate clearance to the top of the foot and cut a series of relief slots in the bootie to give it more compliance. This has made the shoe much better for me.

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Originally reviewed on Merrell

5 out of 5 stars

March 25, 2024

Got what I needed

Good fit. nice cushioning, great traction. Fit my needs


Originally reviewed on Merrell

5 out of 5 stars

March 6, 2024

Love These Sneakers

Love the feel, look and grip . Gives me the confidence to explore where others dare to

user image

Originally reviewed on Merrell

5 out of 5 stars

February 21, 2024

MTL Long Sky 2

Overall comfort and style is great. I recommend this shoe.


Originally reviewed on Merrell