| Name | County | Description |
|
Adams |
| Marcellus Shrub Steppe NAP | Adams | This site protects native shrub-grasslands, once widespread in this part of the Columbia Basin. |
Chelan |
| Camas Meadows NAP | Chelan | This preserve contains the largest known populations of two plant species endemic to the Wenatchee Mnts. |
| Entiat Slopes NAP | Chelan | This site contains one of the largest known populations of a state Threatened plant, the Thompson's clover. |
| Upper Dry Gulch NAP | Chelan | This site protects the largest known population of Whited's milkvetch, a state Endangered plant species. |
Clark |
| Lacamas Prairie Natural Area | Clark | This combined natural area preserve (NAP) and natural resources conservation area (NRCA) protects the best known remnant of the Willamette Valley wet prairie ecosystem in Washington. |
| Washougal Oaks Natural Area | Clark | This combined NAP/ NRCA protects the largest high-quality Oregon white oak woodland in western WA. |
Douglas |
| The Two-Steppe NAP | Douglas | This site contains the largest remaining high-quality shrub-grassland ecosystems in the NW Columbia Basin. |
Franklin |
| Kahlotus Ridgetop NAP | Franklin | This preserve is one of the last examples of the native arid grassland of the eastern Columbia Basin. |
Grant |
| Castle Rock NAP | Grant | This site supports unusually well preserved examples of eastern Washington's shrub speckled grasslands. |
Grays Harbor |
| Carlisle Bog NAP | Grays Harbor | This site supports a diverse and undisturbed example of a sphagnum bog ecosystem and connected lake. |
| Chehalis River Surge Plain NAP | Grays Harbor | This preserve contains the largest and best quality tidal surge plain wetland in the state. |
| Goose Island NAP | Grays Harbor | This island has supported a large colony of nesting seabirds including gulls, brants, and long billed curlew. |
| North Bay NAP | Grays Harbor | This preserve contains one of the highest quality coastal freshwater and sphagnum bog systems in WA. |
| Sand Island NAP | Grays Harbor | This sandy accretion island protects nesting seabird colonies, including historic caspian tern nesting. |
| Whitcomb Flats NAP | Grays Harbor | This island in Grays Harbor supports nesting seabird colonies, including Western gulls and Caspian terns. |
Island |
| Admiralty Inlet NAP | Island | This site protects an endangered plant species, the golden paintbrush (Castilleja levisecta). |
Jefferson |
| Clearwater Bogs NAP | Jefferson | This site protects three sphagnum moss bog ecosystems and sheltering forested drainages. |
| Dabob Bay NAP | Jefferson | This preserve supports one of the few Puget Trough harbor coastal spits still in good condition. |
King |
| Charley Creek NAP | King | This preserve protects 110-145 year old tree stands which provide habitat for northern spotted owl. |
| Kings Lake Bog NAP | King | This site preserves sphagnum bogs and a 2 ac. "eyelet" pond, extremely rare ecosystems in the Puget Trough. |
| Snoqualmie Bog NAP | King | This preserve protects a sphagnum moss bog which is now extremely rare in the Puget Trough. |
Kitsap |
| Kitsap Forest NAP | Kitsap | This site protects extensive, unlogged mature forests in the central and southern Puget Trough ecoregion. |
Klickitat |
| Badger Gulch NAP | Klickitat | This preserve protects native grasslands and oak savannas unique to south-central Washington. |
| Cleveland Shrub Steppe NAP | Klickitat | This preserve contains high-quality examples of native shrub-grassland ecosystems that were once abundant. |
| Columbia Hills NAP | Klickitat | This area contains the largest remnant of one of Washington's rarest types of grassland ecosystems. |
| Monte Cristo NAP | Klickitat | This site contains examples of grand fir communities found in the lower part of the Eastern Cascades. |
| Trout Lake NAP | Klickitat | This preserve is home to one of four remaining Washington populations of the Oregon spotted frog. |
Lincoln |
| Spring Creek Canyon NAP | Lincoln | This preserve contains remnant examples of Douglas-fir/ ponderosa pine forest and shrub-grassland. |
Mason |
| Hamma Hamma Balds NAP | Mason | This fragile ecosystem hosts nearly 200 plant, moss and lichen specie on grassy balds atop oceanic basalt rock. |
| Ink Blot NAP | Mason | This site preserves a low-elevation wetland and bog complex that includes three parallel, elongated basins and their watersheds. |
| Oak Patch NAP | Mason | This site preserves an Oregon white oak woodland and an Oregon white oak-Douglas-fir mosaic. |
| Schumacher Creek NAP | Mason | This site protects an example of the imperiled Sitka alder/ skunk cabbage/ water parsley community. |
| Skookum Inlet NAP | Mason | This site preserves important examples of wetland ecosystems in the lower Puget Sound area. |
Mason, Thurston |
| Kennedy Creek NAP | Mason, Thurston | This site is a good quality remnant of a larger tidal river marsh, providing important habitat for wildlife. |
Okanogan |
| Barker Mountain NAP | Okanogan | This preserve protects examples of shrub-grassland ecosystems (shrub-steppe). |
| Chopaka Mountain NAP | Okanogan | This preserve protects 14 state Sensitive plant species. |
| Davis Canyon NAP | Okanogan | This site contains some of the best examples of the shub-steppe ecosystems that once flourished in WA. |
| Methow Rapids NAP | Okanogan | This site protects examples of native shrub-grassland once found over much of the valley and foothills. |
| Riverside Breaks NAP | Okanogan | This preserve contains examples of two rare types of native shrub-grassland ecosystems. |
Pacific |
| Bone River NAP | Pacific | This preserve contains the finest salt marshes remaining in Willapa Bay. |
| Gunpowder Island NAP | Pacific | This preserve protects nesting seabird colonies, including the rare snowy plover. |
| Niawiakum River NAP | Pacific | This preserve contains some of the highest quality salt marsh vegetation remaining in Willapa Bay. |
| Willapa Divide NAP | Pacific | This preserve protects old growth silver fir, Western hemlock, and Western red cedar. |
San Juan |
| Point Doughty NAP | San Juan | This preserve protects the "rain shadow" vegetation which occurs in the San Juan Islands. |
Skagit |
| Cypress Highlands NAP | Skagit | This preserve includes rare freshwater wetlands and native fescue grasslands on rocky balds. |
| Olivine Bridge NAP | Skagit | This site preserves native vegetation on serpentine soils at low elevations in the Western Cascades. |
| Skagit Bald Eagle NAP | Skagit | This are is a critical bald eagle winter roosting site. |
Skamania |
| Columbia Falls NAP | Skamania | This site protects two state Threatened and four Sensitive plants and one state Threatened animal. |
Spokane |
| Pinecroft NAP | Spokane | This site preserves the largest remaining example of a ponderosa pine/grassland ecosystem. |
Stevens |
| Little Pend Oreille River NAP | Stevens | This site protects a mosaic of wetlands, providing habitat for wildlife and two state Sensitive plants. |
Thurston |
| Bald Hill NAP | Thurston | This preserve protects an unusual number of habitats, plant communities, and 4 state Sensitive plant species. |
| Mima Mounds NAP | Thurston | This preserve protects the best remaining example of the unusual "mima mound" landscape. |
| Rocky Prairie NAP | Thurston | This site preserves an example of the "mima mound" landscape, and native Puget prairie grassland. |
Whatcom |
| Dailey Prairie NAP | Whatcom | This site supports the largest population of several-flowered sedge known to occur in Washington. |
Yakima |
| Selah Cliffs NAP | Yakima | This preserve supports the largest known population of a rare plant known as the basalt daisy. |