 Aside from being a long-time member of The Wilderness Society, he was active in many other conservation-oriented organizations including the Society of American Foresters, the Soil Conservation Society of America, the National Audubon Society, and the Colorado Mountain Club.He was a leader in organizing the Rock Creek Watershed Association which worked to restore and preserve the area around Rock Creek in Washington, D.C. and Maryland.He participated with Justice William O. Douglas in the effort that lead to the creation of the Chesapeake and Ohio Canal National Historical Park.