The two principal river systems of the Grand Traverse Bay Watershed are the Boardman River and the Elk River-Chain of Lakes. The Elk River delivers 60% of the surface flow to the Bay, and the Boardman delivers 30%. The remaining 10% of surface water flow to Grand Traverse Bay comes from other small tributaries draining directly to the Bay.

The watershed may be broken up into nine distinctive major drainage basins: Elk River Chain of Lakes, Boardman River, Mitchell Creek, Acme Creek, Ptobego Creek, Yuba Creek, East Bay shoreline and tributaries, West Bay shoreline and tributaries, and the Old Mission Peninsula.

Click Next to switch between the Sub-Basin Map and a table of Sub-Basin Areas.

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