The Yellowstone to Yukon Conservation Initiative (Y2Y) is a pioneering transboundary conservation network that unites governmental bodies, Indigenous groups, NGOs, scientists, landowners, and communities across a 2,100-mile corridor spanning five U.S. states and two Canadian provinces and territories. Launched in 1993, Y2Y's mission is to maintain ecological integrity and habitat connectivity from the Greater Yellowstone ecosystem in Montana/Wyoming to the Yukon Territory. The organization’s success is reflected in a 300% increase in protected habitat since its inception, along with new corridors and species recoveries .