Friends of Treehuggers International
Anza-Borrego Foundation and Institute
California State Parks Association
Friends of Allegheny Wilderness
Friends of Santa Cruz State Parks
Golden Gate National Parks Conservancy
Mazamas
National Park Service
North Cascades Institute
NPCA (National Parks Conservation Association)
Pro Peninsula
San Bernardino National Forest Association
San Diego Coastkeeper
Save the Redwoods League
Sempervirens Fund
Surfrider Foundation
The California Chaparral Institute
The Mountaineers
The Nature Conservancy
The Nature Trust of British Columbia
The Sierra Club
The Trust for Public Land
The Wilderness Society
U.S. Geological Survey
Washington Trails Association
Washington's National Park Fund
