Friends of Santa Cruz State Parks
- Non-profit group supporting interpretive programs at local parks. Includes program information and volunteer opportunities.
- http://www.scparkfriends.org/

Santa Cruz State Parks
- Information about facilities and programs in all state parks and beaches in the county.
- http://www.santacruzstateparks.org/

Mountain Parks Foundation
- Helping to fund educational and interpretive programs at Big Basin and Henry Cowell Redwoods state parks.
- http://www.mountainparks.org/

Pogonip
- Past, present, and future of the historic Pogonip greenbelt area in Santa Cruz, California.
- http://www.pogonip.org/