 The city is home to North Cascades National Park.Officially incorporated on December 19, 1898, Sedro-Woolley was formed from neighboring rival towns known as Bug and Woolley in Skagit County, northwestern Washington, inland from the Puget Sound, south of the border with Canada and north of Seattle.Four British bachelors, led by David Batey, homesteaded the area in 1878, the time logjam obstructions were cleared downriver at the site of Mount Vernon.