The outdoors is your best gym. It’s free of charge, offers challenges and views at the same time, and is more accessible than your local weight room. In fact, while there were over 36,000 gyms recorded in the United States, there are more than 236,000 miles of trails between federal and state lands.


So it’s time to brush the crusty, dried mud off those trail shoes in the back of your closet for some great trail runs. But, staying sprain-free is key if you want to make trail running your hobby, regular conditioning, or weekly off-day.

Founder of Altra Running Golden Harper shares his top tips to safely get the most of this cardio-coordination duo. If you venture beyond the flat, boring rail trails to one of America’s best trails, you’ll run into some tough terrain, tricky downhills, and butt-busting uphill sections.