For generic search sites, be sure to try a variety of keywords such as recreation, activity, activities, outdoors, municipal, etc. Multiple spellings or variations of the same word can help, too. If the site is yielding too many results (or unrelated results), try searching with phrases such as "therapeutic recreation" with the quotes included. If you receive few results (or none), try searching using only one or two words.
Opportunity kNOCks - www.opportunitynocs.org
Job postings for work with non-profit organizations.
USA Jobs - http://www.usajobs.opm.gov/
Official site for jobs working for the federal government. Positions with Morale, Welfare, & Recreation (MWR) military departments are listed here as well.
Michigan Works - http://www.michiganworks.org
Lots of Michigan-based jobs. Résumé hosting service.
MLive Jobs - www.mlive.com/jobs/
Covers Michigan-based jobs listed directly with MLive, or those listed in the classifieds of any Booth newspaper (Ann Arbor News, Bay City Times, Flint Journal, Grand Rapids Press, Jackson Citizen Patriot, Kalamazoo Gazette, Muskegon Chronicle, and Saginaw News). Free registration required.
Monster.com - www.monster.com
Massive career site. Lots of career-related tools & articles.
Yahoo! Careers - careers.yahoo.com
Various listings. Includes a connection to HotJobs.com (owned by Yahoo!).