Brand: Nike

Category: Trail Running Shoes

Recommended by Nick Petterson, Chiropractor | Ultrarunner — Leander, TX

Highlights: cushioned, long distance, carbon plate, stability

The ACG Ultrafly Trail Running Shoe for men is engineered for speed and stability on rugged terrains, combining advanced cushioning and traction for an unparalleled running experience. With its lightweight design and responsive features, this shoe is perfect for trail enthusiasts looking to enhance their performance. 1. Full-length ZoomX midsole provides exceptional cushioning for soft landings and energetic toe-offs. 2. Redesigned plate offers 30% less rigidity for improved torsional control and smoother transitions on uneven surfaces. 3. Vibram Lightbase outsole with 3mm lugs delivers reliable traction on technical trails and high-speed descents. 4. Vapor Dry upper ensures breathability and quick-drying capabilities while maintaining durability. 5. Internal midfoot band enhances lockdown support for a secure fit during intense activities. 6. Ultra-lightweight construction minimizes fatigue, allowing for longer runs without compromising comfort. 7. Sleek, race-ready design makes it suitable for both competitive events and casual trail outings. The ACG Ultrafly Trail Running Shoe is designed for trail runners seeking to achieve personal records, tackle fast-paced runs, or navigate challenging vertical climbs. It excels in various outdoor conditions, from rocky paths to muddy trails, making it ideal for both seasoned athletes and enthusiastic beginners. This shoe is perfect for spring and fall trail running, providing the grip and support needed for diverse terrains.

Price: $259.95

Who it's for: Trail runners prioritizing speed and race-day performance, particularly on flat to mid-level technical terrain. Notes skew toward competitive use, including race events like Western States.
What people are saying: Hosts consistently praise the carbon plate for responsiveness, speed, and stability on trails. One note flags it as an improvement over the first version; no notable criticism appears across the six notes.
Worth noting: Notes are one-sided positive with no fit, sizing, durability, or surface-limitation caveats raised. The carbon plate is the defining feature called out repeatedly.

Nick Petterson's review

My two previous PR’s have come from using the v1 non-ACG Ultrafly. It remains responsive and cushioned without feeling too bulky over the course of 100 miles. I’ve tried out the ACG version and feel I would be just as if not more happy using them as well.

Recommended by Nick Petterson, Chiropractor | Ultrarunner

Frequently asked questions

Who is the ACG Ultrafly Trail Running Shoe for?

Trail runners prioritizing speed and race-day performance, particularly on flat to mid-level technical terrain. Notes skew toward competitive use, including race events like Western States.

What do experts say about the ACG Ultrafly Trail Running Shoe?

Hosts consistently praise the carbon plate for responsiveness, speed, and stability on trails. One note flags it as an improvement over the first version; no notable criticism appears across the six notes.

What should you know before buying the ACG Ultrafly Trail Running Shoe?

Notes are one-sided positive with no fit, sizing, durability, or surface-limitation caveats raised. The carbon plate is the defining feature called out repeatedly.

What does Nick Petterson say about the ACG Ultrafly Trail Running Shoe?

Why does Nick Petterson recommend Nike?

Nick Petterson recommends the Nike ACG Ultrafly Trail Running Shoe for trail running shoes. My two previous PR’s have come from using the v1 non-ACG Ultrafly. It remains responsive and cushioned without feeling too bulky over the course of 100 miles. I’ve tried out the ACG version and feel I would be just as if not more happy using them as well.

Is the ACG Ultrafly Trail Running Shoe a good trail running shoe?

Yes — Nick Petterson recommends the ACG Ultrafly Trail Running Shoe by Nike as their trail running shoes pick. My two previous PR’s have come from using the v1 non-ACG Ultrafly. It remains responsive and cushioned without feeling too bulky over the course of 100 miles. I’ve tried out the ACG version and feel I would be just as if not more happy using them as well.

Is the ACG Ultrafly Trail Running Shoe good for long distance?

Nick Petterson recommends it for long efforts: My two previous PR’s have come from using the v1 non-ACG Ultrafly. It remains responsive and cushioned without feeling too bulky over the course of 100 miles. I’ve tried out the ACG version and feel I would be just as if not more happy using them as well.

How cushioned is the ACG Ultrafly Trail Running Shoe?

In Nick Petterson's experience: My two previous PR’s have come from using the v1 non-ACG Ultrafly. It remains responsive and cushioned without feeling too bulky over the course of 100 miles. I’ve tried out the ACG version and feel I would be just as if not more happy using them as well.

More from Nick Petterson's 100 miler

View Nick Petterson's expert gear recommendations on Rendezvu

ACG Ultrafly Trail Running Shoe

Purchasing through this link directly supports Nick

Who it's for: Trail runners prioritizing speed and race-day performance, particularly on flat to mid-level technical terrain. Notes skew toward competitive use, including race events like Western States.
What other hosts are saying: Hosts consistently praise the carbon plate for responsiveness, speed, and stability on trails. One note flags it as an improvement over the first version; no notable criticism appears across the six notes.
Worth noting: Notes are one-sided positive with no fit, sizing, durability, or surface-limitation caveats raised. The carbon plate is the defining feature called out repeatedly.

ACG Ultrafly Trail Running Shoe

Who it's for: Trail runners prioritizing speed and race-day performance, particularly on flat to mid-level technical terrain. Notes skew toward competitive use, including race events like Western States.
What other hosts are saying: Hosts consistently praise the carbon plate for responsiveness, speed, and stability on trails. One note flags it as an improvement over the first version; no notable criticism appears across the six notes.
Worth noting: Notes are one-sided positive with no fit, sizing, durability, or surface-limitation caveats raised. The carbon plate is the defining feature called out repeatedly.

Purchasing through this link directly supports Nick

What other hosts are saying

6 experts recommend the Nike ACG Ultrafly Trail Running Shoe.

Brian Whitfield, Runner

Better than the ultrafly 1 super stable comfy and fast!

Recommended in Broken Arrow 46k

Tom Hanlon, Ultramarathon Athlete

This shoe is by far my favorite shoe for mid-low level technical trail running. The shoe is responsive and fast, and the carbon plate brings the speeeed on any flats

Recommended in Western States 100 Kit

Joachim Cassel, Mountain Runner. Community & Events Marketing Professional. Celsius Addict.

Incredible shoes to feel fast and secure on the trails. Built for speed, but work well on technical terrain too.

Recommended in The Bear 100 Gear List

Rachel Drake, Professional Trail Runner

My primary racing shoe, the Ultrafly has a carbon plate and makes me feel speedy and stable.

Recommended in Broken Arrow Kit

Luke Jarman, Ultra Trail Athlete

A great race shoe when you want maximum speed and return at each step.

Recommended in Most Trusted Trail Running Gear

ACG Ultrafly Trail Running Shoe

Purchasing through this link directly supports Nick

Who it's for: Trail runners prioritizing speed and race-day performance, particularly on flat to mid-level technical terrain. Notes skew toward competitive use, including race events like Western States.
What other hosts are saying: Hosts consistently praise the carbon plate for responsiveness, speed, and stability on trails. One note flags it as an improvement over the first version; no notable criticism appears across the six notes.
Worth noting: Notes are one-sided positive with no fit, sizing, durability, or surface-limitation caveats raised. The carbon plate is the defining feature called out repeatedly.

ACG Ultrafly Trail Running Shoe

Who it's for: Trail runners prioritizing speed and race-day performance, particularly on flat to mid-level technical terrain. Notes skew toward competitive use, including race events like Western States.
What other hosts are saying: Hosts consistently praise the carbon plate for responsiveness, speed, and stability on trails. One note flags it as an improvement over the first version; no notable criticism appears across the six notes.
Worth noting: Notes are one-sided positive with no fit, sizing, durability, or surface-limitation caveats raised. The carbon plate is the defining feature called out repeatedly.

Purchasing through this link directly supports Nick