If you’ve ever hiked at Crowders Mountain State Park, you may have encountered a challenge or two — tripped over a tree root or scrambled over a rock face. But it’s a good bet you haven’t come across trash or lost your way because the trail wasn’t well maintained. To a large extent, you have your peers to thank for that. Peers such as the ones who will gather June 5 as part of National Trails Day to make sure Crowders Mountain’s trails remain challenging and invigorating, yet safe and fun.