Recreation by its very nature is more or less elusive of definitions, for people want variety in recreation whether that be accomplished by a change of environment or by different forms of recreation. Tastes in recreation vary from bridge to pack trips in the wilderness; they include active recreation and spectator enjoyment.
"National Forest Recreation Planning,"
Ames Forester: Vol. 29
, Article 3.
Available at: https://lib.dr.iastate.edu/amesforester/vol29/iss1/3