The Skagit River basin is located in southwestern British Columbia in Canada and northwestern Washington in the United States. Major tributaries in the basin are the Baker River, Cascade River, and Sauk River. The Skagit River basin is approximately 110 miles long. The western portion of the basin flows out of the foothills onto the largest delta in Puget Sound. Skagit County, positioned between Seattle and Vancouver (B.C.), split by Interstate 5, is also arguably the most productive agricultural County in Western Washington. Much of the acreage in agricultural production can be found west of I-5; approximately 60,000 acres of sub-tidal farmland.

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"The Skagit River is home to all five salmon species, including the most abundant run in Puget Sound of the iconic Chinook. The largest population of bull trout in Western Washington also resides in the Skagit, along with steelhead and 17 other fish species. The Skagit delta, with its mixed landscape of estuarine/intertidal and agricultural habitats, supports large wintering populations of snow geese, trumpeter and tundra swans, dabbling and diving ducks, shorebirds, and colonial waterbirds (such as great blue herons). Wintering bald eagles and other raptors are also abundant both on the delta and along the upper reaches of the river. The Skagit delta provides winter habitat for 80 percent of western Washington’s waterfowl, and foraging and staging areas for 70 percent of Puget Sound’s shorebird population." - Skagit Climate Science Consortium