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Ultra 100 Trail Running Shoe - Men's

4.857142857142857 out of 5 stars
7 Reviews


Size Chart


Why We Like The Dynafit Ultra 100 Trail Running Shoe

The lightweight Dynafit Ultra 100 Trail Running Shoe was designed for those who test the limits of their endurance. Whether training for an ultra or setting out on race day, this shoe has the cushioning we need to cruise through long miles, with reliable underfoot traction that takes us through all of the changing terrain and conditions we're likely to encounter in the mountains.


  • Lightweight trail runner for long-distance days in rugged terrain
  • Max cushioning eases stress on your feet during high-mileage runs
  • Outsole grips in wet and dry conditions and on hard and soft trails
  • Invisible lacing system covers the laces to prevent wear and tear
  • Toe bumper protects your forefoot from roots and rocks
  • Heel preloader keeps your foot supported and in place as you run
  • Item #DNFZ187
Upper Material
invisble lacing
Support Type
Claimed Weight
Manufacturer Warranty
2 year
trail running

Overall Rating

5 based on 7 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 1 reviews
5 Stars - 6 reviews

What do you think about this product?


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5 out of 5 stars

August 29, 2023

Why did I try other shoes...

I ran in the previous Ultra 100s last year. They were super comfortable, but just needed to size up a full size. This year I thought I'd see what else other brands offered, specifically Salomon, Nike, Adidas, and North Face. After getting nagging injuries I decided to get the new Ultra 100s. My first run in them was a 30-mile, 9k foot run in the most wild conditions here in the Rocky Mountains - dry roots and rocks followed by overgrown wet vegetation, then rutted out switchbacks, a sudden hail storm, wet scree up to Capital Peak, a dry descent through the fields, and a terretial downpour through the rocky/rootie woods back to the car. I left the run with a smile on my face and while the feet were tired, it was a tireness of conquering vs defeat. I'm buying another pair this week. If you try size up a full size and be ready for trail happiness.

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Originally reviewed on Dynafit

5 out of 5 stars

August 14, 2023

Ultra Fun

These shoes are a blast! Used them on a recent 100k and they excelled wonderfully, very comfortable shoe, still very responsive, they are not too plush, a really smooth and fun ride. They look heavily cushioned, but they don't feel like it apart from making them super comfortable over really long distances, still have enough ground feel, very light, not too bulky. Shoes are very durable as I come to expect from Dynafit, outsole is very grippy, great ride on every surface. They are wider/bigger volume than other Dynafit models or the previous Ultra 100, also the lacing system is much better with a better heel lock than the Alpine or Ultra 50, so great improvements. Shoes look awesome, the black and white racing colour is dynamite!


Originally reviewed on Dynafit

5 out of 5 stars

August 4, 2023

Super Trailrunning Shoe

Ich musste den Schuh eine Nummer größer als meine übliche Schuhgröße nehmen, jetzt passt er super.


Originally reviewed on Dynafit

5 out of 5 stars

June 3, 2023

Trail Pillows

I bought this shoe to get back into trail running after a 4-year hiatus. Living in Northern AZ, the trails range from slimy mud to jagged decomposed granite. These shoes tackle everything I throw at them with unparalleled stability and cushioning that rivals a Hoka (without looking like a clown). I have put well over 400 miles of running with an additional 400 miles of hiking on these and they are holding up amazingly. I will be ordering another two pairs soon, as it is usually my luck that when I find something that works, someone changes the mold - I hope they leave this one right where it is! It's perfect!!


Originally reviewed on Dynafit

4 out of 5 stars

May 2, 2023

Quality construction but runs small

Nicely built trail running shoe. As the Dynafit website mentions, they fit small so size up.


Originally reviewed on Dynafit

5 out of 5 stars

March 20, 2023

Much more than a simple update

I'm really impressed with this shoe. It feels much different than the original. In my opinion it is far more stable with a much better fit. The sizing is similar to the original. I like a tight shoe and sized up a half size. If you like a roomy toe box I think you'd be well served to size up a full size. I put hundreds of miles on the original Ultra 100 but almost all were on treadmills because I felt the original was too unstable on trails. This new version is completely different in that regard, feeling much more stable on trails. In fact, this shoe is a joy to run in on trails. I'm also impressed with the shoe's performance in deep, slimy mud. The tread pattern is quite spread out so it doesn't hold on to mud too much and it is relatively easy to clean. I was concerned that the spread out pattern of tread would yield an uncomfortable ride on hard pack trails but the stack hight and relatively firm cushioning creates a very smooth ride. All around a great shoe, more than a simple update.


Originally reviewed on Dynafit

5 out of 5 stars

March 19, 2023

Great kicks

Second pair. Love the fit and the traction. Thank you for freeing the laces at the toe so one can attach gators!


Originally reviewed on Dynafit