Nike ACG Ultrafly Trail

Trail Racing Shoes
46% off
View Product Details
4.6out of 5 stars
How did this product fit?
45% between Runs Small and Runs Big
Would you recommend this product?
How comfortable was this product?
86% between Uncomfortable and Very Comfortable

What Reviewers Say

These trail shoes deliver exceptional grip on loose gravel, dirt, and mixed terrain, with cushioning that holds up on longer runs and technical trails. The wide toe box and secure heel lockdown provide comfort without sacrificing stability, while the responsive platform adds noticeable speed. Note that fit runs tight in the midfoot—those with wider feet should consider sizing up.

AI-generated summary

1-10 of 33 Reviews
Rated 5 out of 5
How did this product fit?:Runs Small
How comfortable was this product?:Average
Would you recommend this product?:Yes
brilliant
brilliant! not worn yet. but they have a potential to be my favorite pair.
GauriD468641112
Aug 21, 2026
Location
GB
Size you normally wear
6.5 or under
What activity do you use this product for?
Walking
What surface do you usually run on?
Road
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Rated 5 out of 5
How did this product fit?:True to Size
How comfortable was this product?:Very Comfortable
Would you recommend this product?:Yes
Awesome Pair
Amazing pair of shoes. I’m a frequent runner on the road and trail (light to mild terrain). Very stable on the heel and very light. The shoes have energy return and you can feel it. It wants you to go faster. I have put in 30 miles and it feels great. Will buy another pair.
Opens Media Viewer to photo submitted by n2nie
n2nie
Aug 9, 2026
Location
US
Size you normally wear
9
What activity do you use this product for?
Mid-range runs (4-12 miles)
What surface do you usually run on?
Road
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Rated 5 out of 5
How did this product fit?:True to Size
How comfortable was this product?:Very Comfortable
Would you recommend this product?:Yes
My new favourite shoe!
Love these! Stable, grippy, comfortable and FAST!

I'm running 20km+ on dirt, gravel, grass and tarmac. Nothing too technical, its Surrey hills basically.

The wide forefoot is good for me. The heel and the lacing are secure, I get a good hold in the heel without having to do a runners knot.
Tariq7f0314c1740a465eb949cfaca3d8d477
Jul 19, 2026
Location
GB
Size you normally wear
9.5
What activity do you use this product for?
Longer runs (13+ miles)
What surface do you usually run on?
Trail
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Rated 5 out of 5
Super comfortable!
[This review was collected as part of a promotion.] Stylish and super comfortable. My husband loved it!
Product received for free, or reviewed as part of a prize draw/giveaway or in exchange for a discount.
Very comfortable
Jul 14, 2026
Location
TN
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Rated 5 out of 5
How did this product fit?:True to Size
How comfortable was this product?:Very Comfortable
Would you recommend this product?:Yes
Great Purchase
Perfect for a quick walk or jog. Great feel!
MichaelJ533796746
Jul 13, 2026
Location
US
Size you normally wear
12
What activity do you use this product for?
Walking
What surface do you usually run on?
Trail
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Rated 5 out of 5
How did this product fit?:True to Size
How comfortable was this product?:Very Comfortable
Would you recommend this product?:Yes
Amazing trail shoe.
Fabulous trail running shoe.
I run 5-10k trail runs three times per week, so a fairly amateur runner. I have been using the Pegasus Trail 5 and Peg 4 GTX mainly this year which are both great shoes. I wanted to try these due to the full ZoomX, carbon plate and Vibram sole. I was hesitant because a lot of the reviews online (incorrectly) paint this as a focussed race shoe only. It’s not.…
Opens Media Viewer to photo submitted by TomW644103353
TomW644103353
Jul 11, 2026
Location
GB
Size you normally wear
10
What activity do you use this product for?
Mid-range runs (4-12 miles)
What surface do you usually run on?
Trail
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Rated 5 out of 5
go-to for anything off-road
[This review was collected as part of a promotion.] ★★★★★
Trail grip is legit — stayed solid on loose gravel and mixed terrain without feeling like I was fighting for footing. Cushioning holds up on the longer, hillier runs and my feet aren't trashed afterward. Look tough enough to survive my questionable route choices too. New go-to for anything off-road.
Product received for free, or reviewed as part of a prize draw/giveaway or in exchange for a discount.
ComradeL
Jul 8, 2026
Location
Valparaiso, IN
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Rated 4 out of 5
How did this product fit?:True to Size
How comfortable was this product?:Very Comfortable
Would you recommend this product?:Yes
Love the color!!! Wide toe box and narrow vamp, GREAT cushioning!!!
The turquoise is beautiful. I wish there were more athletic shoes in this more monochromatic color style. I removed a star due to what I consider a quite wide toe box, yet relatively narrow vamp - and due to this, sizing down wouldn't be an option. I also prefer a cloth material as opposed to this thin whatever-type material, (I realize this will propel water more) but that's just a personal…
KimberleyN539310933
Jul 2, 2026
Location
OH, US
Size you normally wear
7
What activity do you use this product for?
Walking
What surface do you usually run on?
Road
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Rated 5 out of 5
How did this product fit?:True to Size
How comfortable was this product?:Very Comfortable
Would you recommend this product?:Yes
I love the new color iv been waiting for one that is actually red for a long time. my favorite color is red and I just did not like when they made one orange and called it hyper crimson.
carson796090627
Jun 18, 2026
Location
US
Size you normally wear
8.5
What activity do you use this product for?
Shorter runs (1-3 miles)
What surface do you usually run on?
Trail
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Rated 5 out of 5
How did this product fit?:True to Size
How comfortable was this product?:Very Comfortable
Would you recommend this product?:Yes
The shoes are spectacular
These shoes are phenomenal. It took a little break in period but they absolutely sing. I’ve done multiple trail races including a 50k in them. I have over 280 miles on them and they still have pop and feel bouncy and fresh. The toe box is a perfect width. The stability (compared to the ACG zegama) is a little worse, but nothing to be concerned about. They are fast and have held up extremely well.
Opens Media Viewer to photo submitted by TerryS923911156
Opens Media Viewer to photo submitted by TerryS923911156
Opens Media Viewer to photo submitted by TerryS923911156
TerryS923911156
Jun 16, 2026
Location
US
Size you normally wear
10.5
What activity do you use this product for?
Longer runs (13+ miles)
What surface do you usually run on?
Trail
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