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Elk River Natural Resources Conservation Area, totaling is the largest, highest quality estuarine system remaining in Washington or Oregon. It includes diverse habitats, ranging from tideflats and sloughs, saltmarsh and freshwater wetlands, to forested uplands.

Identified as critically important waterfowl and shorebird habitat, it also includes a nesting site for bald eagle and significant habitat for elk, bear, beaver, river otter and other mammals. One population of a Washington state monitor plant species, Henderson's checker- mallow, occurs within the tidal portion of the estuary system.

External links

• Elk River Natural Resources Conservation Area - Washington State Dept. of Natural Resources
• Elk River Estuary - National Audubon Society

v t e Protected areas of Washington
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State	State Parks Alta Lake Anderson Lake Battle Ground Lake Bay View Beacon Rock Belfair Birch Bay Blake Island Blind Island Bogachiel Bottle Beach Bridgeport Bridle Trails Brooks Memorial Cama Beach Camano Island Camp Wooten Retreat Center Cape Disappointment Clark Island Columbia Hills Columbia Plateau Trail Conconully Crawford Curlew Lake Cutts Island Daroga Dash Point Deception Pass Doe Island Dosewallips Doug's Beach Eagle Island Federation Forest Fields Spring Flaming Geyser Forks of the Sky Fort Casey Fort Columbia Fort Ebey Fort Flagler Fort Simcoe Fort Townsend Fort Worden Ginkgo Petrified Forest Goldendale Observatory Grayland Beach Griffiths-Priday Harstine Island Hope Island (Mason County) Hope Island (Skagit County) Ike Kinswa Illahee Iron Horse Jackson House James Island Jarrell Cove Joemma Beach Jones Island Joseph Whidbey Kanaskat-Palmer Kinney Point Kitsap Memorial Klickitat Trail Kopachuck Lake Chelan Lake Easton Lake Lenore Caves Lake Sammamish Lake Sylvia Lake Wenatchee Larrabee Leadbetter Point Lewis and Clark Lewis and Clark Trail Lime Kiln Point Lincoln Rock Lyons Ferry Manchester Maryhill Matia Island Matilda Jackson McMicken Island Millersylvania Moran Mount Pilchuck Mount Spokane Mystery Bay Nolte Obstruction Pass Ocean City Olallie Olmstead Place Pacific Beach Pacific Pines Palouse Falls Palouse to Cascades Paradise Point Patos Island Peace Arch Pearrygin Lake Penrose Point Peshastin Pinnacles Pleasant Harbor Posey Island Potholes Potlatch Rainbow Falls Rasar Reed Island Riverside Rockport Sacajawea Saddlebag Island Saint Edward Saltwater Scenic Beach Schafer Seaquest Sequim Bay Shine Tidelands Skagit Island South Whidbey Spencer Spit Spokane River Centennial Trail Spring Creek Hatchery Squak Mountain Squilchuck Steamboat Rock Steptoe Battlefield Steptoe Butte Stretch Point Stuart Island Sucia Island Sun Lakes-Dry Falls Tolmie Triton Cove Turn Island Twanoh Twenty-Five Mile Creek Twin Harbors Wallace Falls Wanapum Recreational Area Wenatchee Confluence Westport Light Willapa Hills Trail Willie Keil's Grave Yakima Sportsman State Forests Ahtanum Capitol Elbe Hills Green Mountain Loomis Loup Loup Tahuya Teanaway Tiger Mountain Yacolt Burn Natural Area Preserves Admiralty Inlet Badger Gulch Bald Hill Barker Mountain Bone River Camas Meadows Carlisle Bog Castle Rock Charley Creek Chehalis River Surge Plain Chopaka Mountain Clearwater Bogs Cleveland Shrub Steppe Columbia Falls Columbia Hills Crowberry Bog Cypress Highlands Dabob Bay Dailey Prairie Davis Canyon Entiat Slopes Goose Island Gunpowder Island Hamma Hamma Balds Ink Blot Kahlotus Ridgetop Kennedy Creek Kings Lake Bog Kitsap Forest Lacamas Prairie Little Pend Oreille River Marcellus Shrub Steppe Methow Rapids Mima Mounds Monte Cristo Niawiakum River North Bay Oak Patch Olivine Bridge Pinecroft Point Doughty Riverside Breaks Rocky Prairie Sand Island Schumacher Creek Selah Cliffs Skagit Bald Eagle Skookum Inlet Snoqualmie Bog Spring Creek Canyon Trombetta Canyon Trout Lake The Two-Steppe Upper Dry Gulch Washougal Oaks Whitcomb Flats Willapa Divide Natural Resources Conservation Areas Ashford Cattle Point Clearwater Corridor Cypress Island Devils Lake Dishman Hills Elk River Ellsworth Creek Granite Lakes Hat Island Hendrickson Canyon Klickitat Canyon Lake Louise Loomis Lummi Island Merrill Lake Middle Fork Snoqualmie Morning Star Mount Si Naselle Highlands Queets River Rattlesnake Mountain Scenic Area Shipwreck Point Skamokawa Creek South Nemah South Nolan Stavis Stevenson Ridge Table Mountain Tahoma Forest Teal Slough Washougal Oaks West Tiger Mountain White Salmon Oak Woodard Bay Aquatic Reserves Cherry Point Cypress Island Fidalgo Bay Maury Island Nisqually Reach Protection Island Smith and Minor Islands
Other	Former state parks Damon Point Fay Bainbridge Fort Okanogan Fort Ward Park Griffin Bay Mukilteo Lighthouse Park Osoyoos Lake Veteran's Memorial Park Skull Island Upright Channel Wenberg Westhaven Marine protected areas Blanchard Forest Cascadia Marine Trail The Enchantments Goose Island Les Hilde Trail & Trailheads Little Pend Oreille Maritime Washington National Heritage Area Mount Adams Recreation Area Sehome Hill Arboretum Walker Valley ORV Riding Area Withrow Moraine Yellow Island
Category Seattle Washington State Parks and Recreation Commission Commons

• Protected areas of Grays Harbor County, Washington
• Estuaries of Washington (state)
• Washington Natural Areas Program
• Bodies of water of Grays Harbor County, Washington