Recreation Demand

While there a lot of good sites to get recreation demand data and forecasting information, this commercial site is useful.  

http://www.outdoorfoundation.org/research.participation.2013.html

" The Outdoor Recreation Participation Report is the only detailed study of its kind tracking American participation trends in outdoor recreation. The study is based on an online survey capturing responses from over 40,000 Americans ages six and older and covers 114 different activities. "