COROS is proud to partner with Mammoth Trailfest, one of the premier trail running events in the United States. As a brand committed to supporting athletes who push the limits of performance, Mammoth TrailFest provides the perfect stage to connect with the trail running community and showcase our latest innovations. From cutoff chasers to course record breakers, COROS is here to help you train smarter, race faster, and reach your goals.

Mammoth Trailfest Dragon's Back Ascent

🗓️Friday - Sep 19

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Mammoth Trailfest Tenkay

🗓️Friday - Sep 19

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Mammoth Trailfest 50K

🗓️Saturday - Sep 20

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Mammoth Trailfest 26K

🗓️Sunday - Sep 21

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More ways to prep for Mammoth Trailfest

Here are a few dedicated workouts and one training plan to get you prepared for the race day.

6-Week Mountain Running Training Plan
This plan is designed to increase your ability to sustain higher intensities on hilly and technical terrain. It focuses on longer days out at low/moderate intensities and contains a 2-block buildup without taper time but is highly specific to a wide variety of mountain projects. Athletes should be prepared for six running days up to 80km (50miles) weekly. Access to hilly terrain is mandatory.

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Trail Run Fartlek Workout
This workout style is called a Fartlek (varying your pace and intensity throughout your run). After warm up run 6x3 minutes fast, 1:30 easy running. This should be a controlled workout throughout. This workout helps improve speed and endurance, while getting comfortable moving fast on trails.

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Running Specific Strength Workout
60-min lower-body workout designed to increase max strength around 4 compound exercises for runners. Make sure you are familiar with strength techniques before completing this workout.

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