Shannon Creek is a short tributary to the Baker River

Baker River (Washington)

The Baker River is an approximately , southward-flowing tributary of the Skagit River in northwestern Washington in the United States. It drains an area of the high North Cascades in the watershed of Puget Sound north of Seattle, and east of Mount Baker...

 in Whatcom County, Washington, near the southwest border of North Cascades National Park

North Cascades National Park

North Cascades National Park is a U.S. National Park located in the state of Washington. The park is the largest of the three National Park Service units that comprise the North Cascades National Park Service Complex. Several national wilderness areas and British Columbia parkland adjoin the...

. It rises in two forks a few miles south of Mount Shuksan

Mount Shuksan

Mount Shuksan is a glaciated massif in the North Cascades National Park. Shuksan rises in Whatcom County, Washington immediately to the east of Mount Baker, and south of the Canadian border. The mountain's name Shuksan is derived from the Lummi word [šéqsən], said to mean "high peak". The highest...

; the glacier

Glacier

A glacier is a large persistent body of ice that forms where the accumulation of snow exceeds its ablation over many years, often centuries. At least 0.1 km² in area and 50 m thick, but often much larger, a glacier slowly deforms and flows due to stresses induced by its weight...

-fed north fork begins at elevation 5016 feet (1,528.9 m), and the non-glacial south fork begins at 2611 feet (795.8 m). Roughly halfway through its length, the two forks join and then flow into Baker Lake

Baker Lake (Washington)

Baker Lake is a lake in northern Washington in the United States. The lake is situated in the forested Baker River valley southwest of North Cascades National Park, and is fed by that river and numerous smaller tributaries. It lies about north of the city of Concrete.The lake covers an area of ...

 reservoir, at elevation 725 feet (221 m). Shannon Creek joins the Baker several miles downstream of Sulphide Creek

Sulphide Creek

Sulphide Creek is a glacial tributary of the Baker River in Whatcom County in the U.S. state of Washington, located within a steep and narrow canyon on the southeast flank of Mount Shuksan, inside North Cascades National Park. Although called a creek, it is river-like due to its high volume...

 and upstream of Swift Creek

Swift Creek (Washington)

Swift Creek is a southward-flowing tributary of the Baker River, about long, in Whatcom County in the U.S. state of Washington. It rises in glaciers near Table Mountain and Kulshan Ridge, and flows west before being joined by more glacial tributaries...

, a much larger south-flowing drainage.