Boundary Lake [http://www.fs.usda.gov/Internet/FSE_MEDIA/fseprd775769] [http://www.fs.usda.gov/photogallery/colville/?cid=2938]Boundary Lake is a 9.5-acre lake 10 miles north of Metaline Falls, WA. The lake is adjacent to the US/Canada boundary line. It is set in low wooded hills.