Academic association dedicated to the study of Leisure Science, or, the study of the role of leisure including recreation, parks, tourism, outdoor adventure, health, therapy, and sport.

Professional association of recreational therapists, seeking to utilize recreational activities as a means to physical and psychological health, such as reducing depression, stress and anxiety in their clients and help them build confidence and socialize in their community.

Website for the Department of Parks Districts of the State of Illinois.

Website of the National Parks Service. This website includes information on every national park within the National Park System, including recreational opportunities within the parks.

A gateway for discovering recreational opportunities across the United States. Includes information on outdoor and cultural sites spanning all 50 states.

Published reports on this topic from the U.S. Forest Service.