Meander through the Aldo Leopold Legacy Trail System holding Wisconsin's 42 state trails offering a variety of surfaces, open to a wide-variety of activities throughout all seasons. National Trails Day (NTD) has grown to inspire nearly a million trail enthusiasts to flock to their favorite trails to discover, learn about and celebrate trails while participating in educational exhibits, trail dedications, gear demonstrations, instructional workshops and trail work projects. NTD Provides a perfect opportunity to thank volunteers, land managing agencies, and outdoor minded businesses for their support in developing and maintaining trails.