Sierra Club - Vermont Chapter
- To explore, enjoy and protect the wild places of the earth.
- http://www.sierraclub.org/vt/

Vermont Tree Society
- Organization exists as a means of coming together to understand, cherish and sustain the notable trees of the state. Provide events, speakers, photographs and "the Vermont Big Tree List".
- http://www.vermonttreesociety.org/

Proctor Maple Research Center
- A site for maple research, study of sugar maples, and serves as a field classroom.
- http://www.uvm.edu/~pmrc/

Forest Watch
- Membership, news and campaigns to keep a protective eye on the forests of the state and greater region.
- http://www.forestwatch.org/