Yolo Land Trust
- Seeks to protect farmland, habitat, and open space. Includes a map of easements, and parcel details.
- http://www.yololandtrust.org/

Yolo Basin Foundation (YBF)
- Non-profit organization dedicated to educating and inspiring the public about wetlands and wildlife of the Central Valley of California.
- http://yolobasin.org/

Yolo Audubon Society
- A local chapter of the National Audubon Society. Membership information, birding locations, and newsletter.
- http://www.yoloaudubon.org/

Cache Creek Nature Preserve
- Organization protecting a 130-acre property in the lower Cache Creek corridor. Information about their educational programs and tours available.
- http://www.cachecreekconservancy.org/