List of National Natural Landmarks in Washington

There are 18 National Natural Landmarks in the U.S. state of Washington, out of nearly 600 National Natural Landmarks in the United States.

Washington National Natural Landmarks (clickable map)
Name Image Date Location County Ownership Description
Boulder Park and McNeil Canyon Haystack Rocks 1986 47.878611°N 119.801667°W / 47.878611; -119.801667 Douglas Federal, state The most illustrative examples of glacial erratics in the United States.
Davis Canyon 1986 48.243775°N 119.751774°W / 48.243775; -119.751774 Okanogan State, private One of the largest and least disturbed examples of antelope bitterbrush-Idaho fescue shrub steppe remaining in the Columbia Plateau.
Drumheller Channels 1986 46.975°N 119.196389°W / 46.975; -119.196389 Adams, Grant Federal, state, private Illustrates the dramatic modification of the Columbia Plateau volcanic terrain by late Pleistocene catastrophic glacial outburst floods. Includes Columbia National Wildlife Refuge.
Ginkgo Petrified Forest 1965 46.948889°N 120.002778°W / 46.948889; -120.002778 Kittitas State Thousands of logs petrified in lava flows. Part of Ginkgo/Wanapum State Park.
Grand Coulee 1965 47.766667°N 119.216667°W / 47.766667; -119.216667 Grant Federal, state, private An illustration of a series of geological events.
Grande Ronde Feeder Dikes 1980 Asotin Private The best example of basalt dikes, the congealed feeder sources of the Columbia River basalt plateau.
Grande Ronde Goosenecks 1980 Asotin Federal A 1,500-foot (460 m) deep canyon that follows a tortuous path along meanders.
The Great Gravel Bar of Moses Coulee 1986 47.458333°N 119.8°W / 47.458333; -119.8 (Moses Coulee) Douglas State, private Largest and best example of a pendent river bar formed by catastrophic glacial outburst floods that swept across the Columbia Plateau.
Kahlotus Ridgetop 2011 Franklin State The best remaining example of the Central Palouse Prairie grassland subtheme.
Mima Mounds 1966 46.89°N 123.05°W / 46.89; -123.05 (Mima Mounds) Thurston State A prairie containing unusual soil pimples of black silt-gravel.
Nisqually Delta 1971 47.108611°N 122.703056°W / 47.108611; -122.703056 (Nisqually Delta) Pierce, Thurston Federal, state, tribal, private An unusually fine example of an estuarine ecosystem. INcludes Nisqually National Wildlife Refuge.
Point of Arches 1980 Clallam Federal An outstanding exhibit of sea action in sculpturing a rocky shoreline. A unit of Olympic National Park.
Rose Creek Preserve 1984 Whitman Private The best remaining example of the aspen phase of the hawthorne-cow parsnip habitat type in the Columbia Plateau. Managed by The Nature Conservancy.
Sims Corner Eskers and Kames 1986 47.825°N 119.366667°W / 47.825; -119.366667 Douglas Federal, state, private The best examples in the Columbia Plateau of landforms resulting from stagnation and rapid retreat of the ice sheet during the last glaciation.
Steptoe and Kamiak Buttes 1965 47.0325°N 117.298611°W / 47.0325; -117.298611 Whitman State, county, private Isolated mountain peaks of older rock surrounded by basalt, rising above the surrounding lava plateau.
Umtanum Ridge Water Gap 1980 46.85°N 120.544444°W / 46.85; -120.544444 Kittitas Federal, state, private Geologic formation that illustrates the processes of tectonic folding and antecedent stream cutting.[1]
Wallula Gap 1980 46.044444°N 118.946667°W / 46.044444; -118.946667 Benton, Walla Walla Federal, state, county, municipal The largest and most spectacular of several large water gaps through basalt anticlines in the Columbia River basin.
Withrow Moraine and Jameson Lake Drumlin Field 1980 47.6875°N 119.624722°W / 47.6875; -119.624722 Douglas Federal, private The best examples of drumlins and the most illustrative segment of the only Pleistocene terminal moraine in the Columbia Plateau

References
General
  • "National Natural Landmarks by state: Washington". National Park Service. Retrieved June 30, 2017.
  • "National Registry of Natural Landmarks" (PDF). National Park Service. June 2009. pp. 100–103. Retrieved June 30, 2017.
Footnotes
  1. "Umatanum Gap is designated natural landmark". The Seattle Times. November 27, 1980. p. A56.
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