• 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: 12.9oz
    Women: 10.7oz
  • Heel to toe drop
    Men: 0mm
    Women: 0mm

    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: 25mm
    Women: 25mm
  • Forefoot height
    Men: 25mm
    Women: 25mm
  • Width
    Men: Normal
    Women: Normal
  • Release date
    Aug 2018
Show more facts


  • The Lone Peak 4.0 Mid RSM is a trail companion that’s part of Altra’s All-Weather Series (AWS). This shoe is meant to handle all kinds of weather conditions, improving confidence when traversing the trails at any time and in any season. The upper unit features the eVent®, a breathable, multilayered technology that is also waterproof.
  • Cushioning is the responsibility of the recycled A-Bound™ foam and ethylene vinyl acetate (EVA). These full-length midsole compounds are also meant to attenuate impact shock. A StoneGuard™ layer protects against sharp objects on the trail. The DuraTread™ rubber offers traction over different kinds of terrain, even wet ones.

The Altra Lone Peak 4.0 Mid RSM is smaller than the usual measurements, so runners are encouraged to get a pair that’s a full size bigger than their preferences to enjoy an accommodating in-shoe experience. When it comes to width, the available options are D – Medium for men and B – Medium for women.

DuraTread™ is a rubber compound that’s responsible for protecting the foam midsole from wear and tear. It is also crafted to provide traction over the surfaces. Omnidirectional nodes offer trail-optimized clamping for precise movement over irregular topography.

The TrailClaw™ technology involves several gripping lugs that are placed right underneath the metatarsals of the foot. These protrusions are constructed to heighten traction and surface control, particularly when tackling upward and downward traversals.

A-Bound™ is a full-length cushioning unit that provides immediate support to the underfoot. It is made using recycled materials. It is resilient and long-lasting.

Ethylene vinyl acetate (EVA) is an industry-standard foam. Its job is to attenuate shock and transition the foot smoothly towards the toe-off. It is also flexible and responsive.

StoneGuard™ is a thermoplastic polyurethane sheet that is placed between the EVA and the A-Bound™. This layer is tasked with protecting the foot from any sharp objects that may piece the cushioning platform.

A 5-millimeter footbed is placed on top of the primary cushioning system. This add-on has a contoured design that supports the curves of the foot-pad.

The upper unit of the Altra Lone Peak 4.0 Mid RSM is composed of the eVent®, a multilayered textile that is waterproof. It has a Direct Venting Technology that disperses heat from the foot-chamber, allows air to enter, and stops water completely.

The mid-cut design of this RSM (rain, snow, mud) model encompasses the ankles and the bottom part of the lower leg. Such a configuration helps in securing the foot and staving off any debris or water from entering the interior compartment.

The 4-point GaiterTrap™ is a loop-and-secure system that holds external gaiter attachments. Such a feature further protects against any potentially invasive element on the trail.