| 11th Hour Project / Schmidt Family Foundation | Onion Foundation |
| Adams Legacy Foundation | Outdoor Foundation |
| Alumbra Innovations Foundation | Parish Family Fund |
| Arc’teryx | Pisces Foundation |
| Arthur M. Blank Family Foundation | Pittman Family Foundation |
| Captain Planet Foundation | Quimby Family Foundation |
| David and Lucile Packard Foundation | REI |
| Elmina B. Sewall Foundation | Roundhouse Foundation |
| Environmental Stewardship Fund | Sahm Family Foundation |
| Evo | Sand Hill Foundation |
| George B. Storer Foundation | Swantz Family Foundation |
| Google.org | Telluray Foundation |
| Gray Family Foundation | The Curtis & Edith Munson Foundation |
| Great Outdoors Colorado (GOCO) | The Grossman Family Foundation |
| Harold M. and Adeline S. Morrison Family Foundation | The Keith Campbell Foundation for the Environment |
| JT Hershey Foundation | The North Face |
| Justice Outside | The Russell Family Foundation |
| Leonard C. and Mildred F. Ferguson Foundation | The San Diego Foundation |
| Maxwell/Hanrahan Foundation | The Schad Foundation |
| National Environmental Education Foundation | Veronique Pittman |
| National Park Foundation | William Penn Foundation |
| National Recreation Foundation | Winnebago Industries Foundation |
