Official visitors guide to Lake Shannon boat rentals, jet skis, water sports, and boat tours along this narrow reservoir on the Baker River in Skagit County in state of Washington. Created in the 1920s by the construction of an arch dam just above the river's mouth, the lake is approximately 7.5 miles long and averages 0.6 miles wide. The reservoir is located just outside the western boundary of North Cascades National Park and just north of Concrete.
Lake Shannon is about 1 mile north of Concrete and 15 miles east of Mount Vernon. The lake itself is mostly accessed by following the Baker River Road, which actually leads upstream along the valley to the boundary of North Cascades National Park. Parts of Lake Shannon are within the Mount Baker National Forest, which also contains all of Baker Lake another great destination for watercraft. Swimming, wakeboarding, wakesufing, tubing, wake skating, boating and water-skiing are available on the lake.