Lofty Aspirations
- Article from Smithsonian Magazine on the increasing popularity of recreational tree climbing.
- http://www.smithsonianmag.com/issues/2002/march/aspirations.php

Pacific Tree Climbing Institute
- Registered outfitter/guide service offers customized trips and instructional programs designed to meet the diverse needs of most people regardless of age, experience or physical ability. Includes details of expeditions and education programs, news and FAQ
- http://www.pacifictreeclimbing.com

Tree Climbing Colorado
- Provides general information, pictures, FAQs, a calendar of events and a membership form. Located in Arvada, Colorado, United States.
- http://www.treeclimbingcolorado.com

Arbor Quest Unlimited
- Non-profit organization in Michigan offers climbing activities for people of all abilities and all ages. Includes details of specialized equipment, photos, upcoming events and links.
- http://www.arborquest.org

Tree Climbing - Michigan
- Offers a discussion forum plus photos.
- http://groups.yahoo.com/group/tcmi/

Dancing With Trees
- Offers guided tree climbing experiences for adults and children based in the north Georgia mountains. Includes pictures, information, quotations, and links.
- http://www.dancingwithtrees.com/

Tree Climbing World
- News. Trip reports and photos. Links.
- http://www.treeclimbingworld.com/

Tree Climbers International
- Articles on tree care, equipment use, cat rescue, and other tree climbing issues. Discussion forum. Photos.
- http://www.treeclimbing.com/

Tree Climbing Japan
- News and articles. Examples of gear used. Discussion forum. Photos.
- http://www.treeclimbingjapan.com/