Whatcom County, Washington (Wikipedia)

Birch Bay, Washington (Wikipedia) Birch Bay is a protected bay of the east shore of the Salish Sea, between Semiahmoo Bay and Lummi Bay; approximately 100 miles (160 km) north of Seattle and 35 miles (56 km) south of Vancouver, BC, Canada.
Lake Samish (Wikipedia) Lake Samish (/ˈsæmɪʃ/ SAM-ish) is a lake south of Bellingham, Washington, United States.
Nooksack River (Wikipedia) The Nooksack River is a river in western Whatcom County of the northwestern U.S. state of Washington, draining extensive valley systems within the North Cascades around Mount Shuksan, Mount Baker and the Twin Sisters, and a portion of Fraser Lowland south of the Canada–United States border.

borders

Whatcom County (/ˈwɒtkəm/, /ˈhwɒtkəm/) is a county located in the northwestern corner of the U.S. state of Washington, bordered by the Lower Mainland (the Metro Vancouver and Fraser Valley Regional Districts) of British Columbia to the north, Okanogan County to the east, Skagit County to the south, San Juan County across Rosario Strait to the southwest, and the Strait of Georgia to the west. Its county seat and largest population center is the coastal city of Bellingham, comprising the Bellingham, WA Metropolitan Statistical Area, and as of the 2020 census, the county’s population was 226,847.