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| The Irvine Ranch Land Reserve ® -more than 50,000 acres of permanently protected open space in the heart of Orange County, California offers a rich menu of recreational opportunities, from hiking and horseback riding to bird-watching and picnicking. On October 10, 2006, nearly 75 percent of the IRLR - approximately 37,000 acres - was designated as a National Natural Landmark by the U.S. Department of Interior, recognizing the land as a nationally significant natural area. | |||||
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