Have you noticed that mud season is starting early, or that counting on snow for skiing over your winter vacation doesn’t seem to be a safe bet anymore? What about changes in when the sap starts to flow, or the lake ice is safe for fishing? This page provides information about a group of affiliated research and stakeholder engagement projects interested in studying the changing character of winters in seasonally snow-covered North America, and the effects of these important changes on the environment—with special focus on forests and wildlife—and people. We are a group of researchers and practitioners working across these socio-ecological systems to understand the state of the science, likely impacts, and possible strategies for mitigation and adaptation in light of shorter and less predictable winters.