Coming November 17, 2018. Take a hike! Tomorrow is National Hiking Day, so get your hiking boots on and head outside. This year marks the 50th anniversary of the National Trails System Act as well as the Wild and Scenic Rivers Act, two important legislative acts that help establish trails and waterways in both urban and rural settings, so we can all enjoy them. With more than 60,000 miles of trails in the National Trail System across 50 states, you’re sure to find one near you. So it’s time to bundle up and enjoy the fresh air and exercise on National Hiking Day!