| Patuxent Wildlife Refuge: Laurel, MD | Horizons for Youth: Sharon, MA |
| Appalachian Trail Conference: Harpers Ferry, WV | American Rivers: Washington, DC |
| The Biking Expedition: Henniker, NH | Massanutten Tour Company: Harrisonburg, VA |
| Student Conservation Association: various locations | Outward Bound USA: Garrison, NY |
| Hurricane Island Outward Bound School: Rockland, ME | Northern Outdoors: The Forks, ME |
| Rails to Trails Conservancy: Washington, DC | Rails to Trails Conservancy: Harrisburg, PA |
| Wilderness Adventure at Eagle Landing: New Castle, VA | Richmond Raft Company: Richmond, VA |
| Waquoit Bay Marine Research Reserve: Waquoit, MA |