- Arbor Quest Unlimited
- Non-profit organization that provides tree climbing adventures to people with disabilities. Includes overview of the institution and service description.
- Dancing With Trees
- Offers recreational tree climbing services to adults and children. Course description and schedules provided.
- The Dead Tree Climbing Society
- Provides guide to convert a dead tree to a climbing wall. Details of instruction included.
- Pacific Tree Climbing Institute
- Offers climbing programs and guided trip services. Overview of the organization and service description included.
- Tree Climbers International
- Provides classes to beginners and advanced climbers. Course overview and articles about tree climbing provided.
- Tree Climbing Colorado
- Presents annual recreational tree climbing rendezvous. Information on membership and overview of the location included.
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