The National Wildlife Refuge System is committed to building partnerships which encourage conservation and preservation of our natural and cultural resources.  Partnerships with the Refuge System bring innovative approaches to solving land management and water disputes in the most environmentally protective manner.  Scientifically-informed and technologically-based stewardship of our public lands, waters, wildlife and special places must be collaborative efforts between the Refuge System, other government agencies, and private organizations if conservation efforts are to succeed.

Castle Rock National Wildlife Refuge is part of the Humboldt Bay National Wildlife Refuge Complex which partners with Humboldt State University, National Park Service, Bureau of Land Management, US Geological Survey, US Coast Guard, The Nature ConservancyCalifornia State Coastal Conservancy, Redwood Region Audubon Society, California Waterfowl Association, National Fish & Wildlife Foundation,  Ducks UnlimitedPacific Coast Joint Venture, The Aleutian Goose Working Group, Trout Unlimited, Friends of the Dunes, Friends of Humboldt Bay National Wildlife Refuge, The Fortuna Creeks Project, local schools, communities, ranchers, and others.