Walther Slough, North Dakota

572.5 acres

Surface Area

Where It Sits, and How Deep It Goes

Locator - North Dakota

46.20 degrees N, 100.38 degrees W - Emmons County. State and county outlines drawn from Census boundary data; the lake marker is placed by its North Dakota Game and Fish coordinates, not by eye. Schematic - not a survey map.

Facts and Figures

Waterbody ID{062E1E75-D36B-43E0-858B-9524C3BE28C1}

CountyEmmons

Coordinates46.1996, -100.3764

Deepest Natural Lakes in North Dakota

#	Lake	County	Surface Area	Max Depth
1	Stump Lake	Nelson	17,681 acres	77.1 ft
2	Devils Lake	Ramsey	110,763 acres	58.1 ft
3	Free Peoples Lake	Benson	891 acres	55.3 ft
4	Spiritwood Lake	Stutsman	493 acres	54.7 ft
5	Moon Lake	Barnes	115 acres	54.3 ft

Largest Lakes in North Dakota

#	Lake	County	Surface Area	Max Depth
1	Lake Sakakawea	McLean	350,520 acres	180 ft
2	Lake Oahe	Emmons	309,912.6 acres	200 ft
3	Devils Lake	Ramsey	110,763 acres	58.1 ft
4	Stump Lake	Nelson	17,681 acres	77.1 ft
5	Long Lake	Burleigh	16,934 acres	-

Sources: USGS NHD lake data (ID {062E1E75-D36B-43E0-858B-9524C3BE28C1}). Verified October 30, 2026.