Park City Mountain Resort - http://www.parkcitymountain.com/summer/index.html
Deer Valley Resort - http://www.deervalley.com/index.jsp
The Canyons - http://www.thecanyons.com

Helpful Websites:

Chamber of Commerce (Events and Maps) - http://www.parkcityinfo.com
Park Record (Newspaper) - http://www.parkrecord.com
Utah Travelers Bureau - http://www.utah.com
Utah Golf Association - http://www.uga.org
Ski Utah - http://www.skiutah.com

Activities/Events:

Concert Series
Deer Valley - http://www.deervalleymusicfestival.org
Eccles Center - http://www.ecclescenter.org
The Canyons - http://www.skitown.com/resortguide/event.cfm/s0/ut09.htm
Utah Winter Sports Park - http://www.olyparks.com
The Egyption Theater - http://www.egyptiantheatrecompany.org