• Discontinued
  • 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: 10.5oz
    Women: 9oz
  • Heel to toe drop
    Men: 6mm
    Women: 6mm

    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.

  • Heel height
    Men: 24mm
    Women: 24mm
  • Forefoot height
    Men: 18mm
    Women: 18mm
  • Width
    Men: Normal
    Women: Normal
  • Release date
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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83 / 100 based on 7 expert reviews

  • 87 / 100 | Trail Runner Magazine

    A great shoe for the worst conditions: sloppy trails, rocky scrambles, brambly bushwhacks and the like.

  • 80 / 100 | Top Ten Reviews

    This model is a better choice for moderate distances rather than long jaunts over extended runs.

  • 91 / 100 | OxGadget

    Warm, comfortable, and a grip that works in all terrains means these boys tick all the boxes.

  • 82 / 100 | Gear Exposure

    If Merrell could shave-off some of the weight while keeping the protection it would be even better.

Show moreless reviews
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  • Based on the name itself, Merrell offers a shoe that lets the runner go all out without any inhibition in the Terra Trail. The rugged and durable design with superior grip on a multitude of trail surfaces takes the runner’s experience in the outdoors to a more enthralling level.
  • Merrell slightly deviates from its renowned mastery in making minimalist trail shoes as the All Out Terra Trail is fitted with adequate cushioning, superior trail protection scheme, and more structure and support. Despite the substantial support and structure, it runs nimbler and lighter than the weight shoes. There is also good enough flexibility and ground feedback that minimalist runners will likely enjoy.
  • Merrell also comes up with a new inner sock that improves the wraparound comfort and secured feel of this shoe. Additionally, this plush inner sock helps with the shoe’s ability to keep off trail debris from getting inside the shoe.

Merrell’s signature snug heel and midfoot with a roomy toe box is very evident in the All Out Terra Trail. While the snug fit enhances the need to pick up speed, the ample room in the forefoot gives that plush feel and caters to the needs of runners with different foot dimensions. The available width is medium for this shoe. Sizing is regular with choices for the men’s starting from 6 to 15 while the women’s are from 5 to 12.

Merrell sticks with the tried and tested Vibram outsole that utilizes diamond shaped lugs all over the outsole for superior grip on grass, mud, rocks, and technical trail. Just above the outsole is a flexible but sturdy Trail Protect Plate that prevents sharp objects from making an impact in the underfoot.

The UniFly midsole continues to drive most of the trail shoes in Merrell’s fold. It is made of high-quality EVA with company exclusive technologies to produce a lightweight foam with exceptional shock dispersing features and moderate cushioning.

The upper is made of synthetic AirMesh for excellent breathability. As this is made of high-quality material, the upper guarantees a long-lasting performance. There are also several synthetic overlays in the midfoot and just around the heel for superior locked down feel and support. Merrell’s bootie-style construction of the upper helps with the anti-debris characteristics of the shoe and adds a dose of stability by holding the heel firmly in place. More than just plush comfort, the interior of the shoe is very healthy courtesy of the M Select lining that wicks moisture away and fights off odor. The Removable Microfiber Footbed adds step-in comfort, cushioning, and is made of Aegis material for its anti-microbial properties.