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

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/

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

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

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

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

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