Twenty leaders in sustainable design, development, and theory attended the workshop held at Shadowcliff, a retreat center in Grand Lake. Brian Dunbar and Josie Plaut, directors of the Institute for the Built Environment (IBE) facilitated the workshop along with Bob Berkebile, lead architect on the first certified “Living Building” in the world and the leader in the rebuilding of Greensburg, Kansas. Attendees included Sustainability Directors from government, private industry, and non-profits. During the 4 day workshop, the attendees focused on the Living Environments in Natural, Social, and Economic Systems (LENSES) framework created by IBE and worked with representatives of the Grand Lake community to envision a “regeneration” of the Trail River Ranch property within Rocky Mountain National Park.