REI Co-op On The Trail Run Shorts - Men's

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Dodging roots and rocks on your next trail run, you'll wonder how you ever got along without the stretchy support and breathable, wicking comfort of the men's REI Co-op On the Trail run shorts.

  • Features

    • Wicking, breathable, 4-way stretch polyester fabric with a durable water repellent (DWR) finish sheds light rain
    • Built-in liner wicks moisture for added comfort
    • Wide waistband ensures all-day comfort; drawcord lets you fine-tune the fit
    • Dual-entry lumbar pocket is perfect for quickly stowing a snack, gloves or hat; zippered side pocket secures small trail essentials
    • Sewn with flat seams for non-chafing comfort
    • Strategically placed fabric perforations add breathability
    • Reflective hits help you stay visible in low-light situations


    View the REI Co-op Trail Product LineView all REI Co-op Men's Running Shorts
  • Technical Specs

    Best Use


    Trail Running


    84% polyester/16% spandex (bluesign® approved)

    Inner Liner


    Liner Fabric

    Recycled polyester (bluesign® approved)

    Moisture Wicking


    Quick Drying


    Inseam (in.)

    5 inches






    Contains materials that meet the bluesign® criteria

    Contains recycled materials

  • Size Chart

    XSSMLXLXXLXXXL24 IN Waist26 IN Waist28 IN Waist30 IN Waist31 IN Waist32 IN Waist33 IN Waist34 IN Waist35 IN Waist36 IN Waist38 IN Waist40 IN Waist42 IN Waist44 IN Waist46 IN Waist48 IN Waist50 IN Waist
    Chest3536 - 3839 - 4142 - 4546 - 4950 - 5354 - 57
    Sleeve Length3333.53434.53535.7536.5
    Waist27.528 - 3032 - 3436 - 3840 - 4244 - 4648 - 502426283031323334353638404244464850
    Hip33.534.5 - 36.537.5 - 39.541 - 4344 - 46.547.5 - 50.551.5 - 54.53233.534.536.53737.538.539.540.2541434446.547.550.552.554.5

    Sizing Notes

    Measurements are stated in inches unless otherwise indicated.

    SHORT: Some pants are available in short sizes, which generally means an inseam that is 2.5 inches shorter than regular sizes.

    TALL: Some pants, shirts, jackets and parkas are available in tall sizes, which generally means an inseam that is 3 inches longer and a rise that is 1 inch longer, a shirt or jacket body that is 2 inches longer, a parka body that is 2.5 inches longer and sleeves that are 2.5 inches longer than regular sizes.

    Capri or cropped pants have an intentionally shorter inseam—reference the technical specs instead of this chart.

  • Reviews
    56 reviews with an average rating of 4.3 out of 5 stars

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