The Island is an extremely high quality juniper/sagebrush savanna with lush, dense, vigorous growth of native bunchgrasses. The Island is the best known, most extensively researched, and least disturbed example of this native juniper savanna community that is currently protected within the Columbia Plateau biophysiographic province.
Year designated: 2011
Please remember, National Natural Landmarks (NNLs) are not national parks. NNLs are owned by a variety of public and private entities and allowing visitation is at their discretion. Many NNL sites maintain public websites where additional information may be found.