The 618 ha High Peak-Moon Creek RNA was established to protect a 100 to 150 year old coastal forest of hemlock (Tsuga heterophylla) and Douglas fir (Pseudotsuga menziesii), scattered 500 year old Douglas fir trees, and riparian hardwoods. It lies approximately 18 km south-southeast of Tillamook in Tillamook County, Oregon. Major plant communities are mature western hemlock and Douglas fir forests with fire history, riparian hardwoods, sword fern (Polystichum munitum) and salal (Gaultheria shallon). Annual precipitation averages 305 cm in a maritime climate. Elevation ranges from approximately 150 to 840 meters. Soil series include Hemcross, Harslow, and Klisten. Past disturbances include a major fire in 1876. Also, the northeast portion of the RNA was burned during the Tillamook fire. L.R. Scofield, BLM, monitored populations of fetid adder's tongue (Scoliopus hallii) from 1979 to 1984. Research was conducted on withered bluegrass (Poa marcida) from 1987 to 1991.

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Access by gravel roads