
The Irvine Ranch Natural Landmarks consist of nearly 40,000 acres of biological and geological diverse open spaces and are home to hundreds of species of plants and wildlife. The Landmarks were designated as a Natural Landmark by both the State of California and the U.S. Department of the Interior after scientists identified the landscape as one of the world’s biodiversity “hot spots,” or an area with large concentrations of different species. Volunteers are a vital part of keeping the trails and surrounding habitat healthy for plant life, wildlife, and the enjoyment of visitors for years to come.