People using the Oak Leaf Trail in Milkwaukee. A new study from Rails-to-Trails Conservancy finds that trails contribute $1.5 billion annually to Wisconsin's economy. Findings were released during a ceremony for the organization's 2019 Rail-Trail Champion, Keith Laughlin, who is credited as the visionary of connecting trails to create active transportation networks. Photo Front Room Media, courtesy Rails-to-Trails Conservancy.