We spent 9 hours reading reviews from experts and users. In summary, this is what runners think:

9 reasons to buy

  • A few users said that the overall construction felt sturdy.
  • Plenty of people noticed that the outsole performs well on soft terrain.
  • Some reviewers observed that the weight is light for a trail shoe.
  • One user mentioned that it provided good arch support.
  • Many appreciated the color combination and design.
  • A tester said that she did not feel any pain after 10 hours of standing and walking.
  • Reviewers believed that the shoe was of good value.
  • A couple of testers expressed that the padding and cushioning was sufficient.
  • A majority of runners agreed that the comfort provided is ample.

4 reasons not to buy

  • A good number of runners mentioned that they experienced hot spots, especially in the heel area.
  • The skin on a few testers’ heel and ankle areas sustained some blisters after running.
  • One user said that the shoe had to be broken in. This user had to hike for 4 to 5 miles to do this.
  • Most runners felt that the fit was a tad tight.

Bottom line

The Under Armour Horizon STR is a neutral running shoe that was designed for the everyday trail runner. Many agreed that the outsole worked well on soft terrain as well as on other surfaces. The cushioning and comfort was also sufficient for most reviewers. However, there were those who mentioned that the fit was a bit tight. Some runners also experienced blisters and hot spots. The reviews were mixed but, overall, the shoe proved to be good enough for everyday trail needs.


  • Terrain


    Shoes best for road, track and light gravel. See the best road shoes.


    Shoes best for trail, off road, mountains and other unstable surfaces. See the best trail shoes.

    Good to know

    As long as you stick to the road or path, and if you want just one running shoe, buy a road running shoe.

  • Arch support

    Neutral / cushion / high arch

    Shoes for runners who do not need any additional arch support (Around 50% of runners). Best for people with normal, high or medium high arches. See the best neutral shoes.

    Stability / overpronation / normal arch

    Shoes for runners who need mild to moderate arch support (Around 45% of runners). Best for runners with a low arch. See the best stability shoes.

    Motion control / severe overpronation / flat feet

    Shoes for runners who needs a lot of arch support. Best for runners with flat feet. See the best motion control shoes.

    Good to know

    - Rule of thumb: If in doubt, buy neutral shoes to avoid injuries.
    - More about arch support in this video.
    - Find your arch type by following steps from this video.

  • Use

    Daily running

    Cushioned shoes for your daily easy running. Great comfort. See best shoes for daily running.


    Lightweight shoes good for races, interval training, tempo runs and fartlek. Here are the best competition running shoes.

    Good to know

    If you want just one pair of shoes, buy a shoe for daily running.

  • Price
  • Weight
    Men: 11.4oz
    Women: 9.5oz
  • Heel to toe drop
    Men: 7mm
    Women: 7mm

    The height difference from the heel to the forefoot, also known as heel drop, toe spring, heel to toe spring or simply drop.

    There are many opinions about what a good heel drop is. We do not recommend any in particular. Lean more in this video.

  • Width
    Men: normal
    Women: normal
  • Release date
    Apr 2017
Show more facts


Expert Reviews

Experts are runners, who post reviews at youtube, directly at RunRepeat or at their own websites. Each expert is categorized from level 1 to level 5 based on expertise. See stats on expert reviews and how we calculate scores here.

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  • First look / Unboxing | Shop Zappos

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Updates to Under Armour Horizon STR

  • The Under Armour Horizon STR has been reinforced with welded synthetic material in areas that need durability the most. Doing this enhanced the sturdiness of the shoe’s construction to prevent early signs of wear and tear during trail runs.
  • A plush foam was placed around the ankle collar to provide enhanced support. A padded collar prevents irritation and rubbing on the Achilles tendon.
  • The outsole is made up of a high traction rubber composed of lugs that have been placed strategically to provide sufficient traction in a variety of conditions.

Under Armour Horizon STR size and fit

The Under Armour Horizon STR is available in standard running shoe lengths. Those interested will be able to use their usual size preferences. The width is similar, coming in standard measurements of B – medium and D – medium for women and men respectively.


The outsole is made up of a high traction rubber which provides a good amount of grip on different surfaces. The rectangular lugs have different sizes on different underfoot areas, digging into different terrain, and enhancing the reliability of the grab.


The midsole is made with a full-length EVA foam which provides a good amount of cushioning. Typically, the running shoes of today have this kind of foam as a platform because it’s lightweight and it’s soft on the underfoot. It also delivers adequate responsiveness and energy return.


The upper is made of a Polyutherane material or PU for short. It is very durable and resistant to cracking while delivering protection from UV damage. Because the material is plastic-like, it’s easy to clean and is somewhat waterproof. It also does not absorb moisture.

Reinforcing the upper are welded synthetic materials which were placed on different critical areas to enhance durability. The reinforcements also help in locking the midfoot down, preventing this part from moving laterally during runs.

For breathability, mesh material was introduced to the heel part. The mesh fabric is made of a network of threads. With space in between these threads, air can easily pass in and out, making the inside of the shoe cool and breathable.

A plush foam was added around the ankle collar to deliver comfort and protection to the Achilles tendon. With this cushioning, there’s also lesser chances of skin irritation.