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.

Instructions for converting a dead tree into a climbing wall.

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 FAQs. Located in Eugene, Oregon, United States.

Articles on tree care, equipment use, cat rescue, and other tree climbing issues. Discussion forum. Photos.

Offers a discussion forum plus photos.

Provides general information, pictures, FAQs, a calendar of events and a membership form. Located in Arvada, Colorado, United States.