American Heart Walk - Orange County: The American Heart Association's Irvine California Heart Walk. Location, event and donation information.
California Martial Arts Academy: Children's and adults' programs. Locations in Irvine, Mission Viejo, and Rancho Santa Margarita.
Irvine Ranch Land Reserve: Offers parks, trails and wilderness for recreational activities.
Nishiki Koi Club: Includes members' ponds, information on keeping koi, and meeting details.
PlayOCgolf: Information about Orange County golf courses.
The Legacy Project: Documents the transformation of the shuttered El Toro Marine Corps Air Station into a metropolitan park, the Orange County Great Park, by oral history, photographs and video.