Lakes / Wyoming / Sweetwater County

Lakes in Sweetwater County, Wyoming

24 lakes counted in Sweetwater County - the largest is Flaming Gorge Reservoir at 38,888.36 acres.

Lakes Counted

38,888.36 acres

Largest - Flaming Gorge Reservoir

440 ft

Deepest - Flaming Gorge Reservoir

Sweetwater County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.

All Counted Lakes

#	Lake	County	Surface Area	Max Depth
1	Flaming Gorge Reservoir	Sweetwater	38,888.36 acres	440 ft
2	Eden Reservoir	Sweetwater	1,361 acres	13 ft
3	Mahoney Lakes	Sweetwater	982.53 acres	-
4	Lost Creek Lake	Sweetwater	911.19 acres	-
5	Hay Reservoir	Sweetwater	529.55 acres	-
6	Monument Lake	Sweetwater	294.91 acres	-
7	Bush Lake	Sweetwater	229.43 acres	-
8	Frewen Lake	Sweetwater	180.14 acres	-
9	Jim Bridger Project Evaporation Pond	Sweetwater	176.43 acres	-
10	Red Lakes	Sweetwater	176.43 acres	-
11	Mud Springs Lake	Sweetwater	160.97 acres	-
12	Jim Bridger Reservoir	Sweetwater	148 acres	35 ft
13	Mud Lake	Sweetwater	100.08 acres	-
14	Brannan Reservoir	Sweetwater	99.13 acres	-
15	Solid Waste Disposal Cell H Reservoir	Sweetwater	85.33 acres	-
16	Number 3 Evaporation Reservoir	Sweetwater	82.29 acres	-
17	Number 2 Evaporation Reservoir	Sweetwater	78.83 acres	-
18	Scotty Lake	Sweetwater	72.38 acres	-
19	McKay Lake	Sweetwater	71.1 acres	-
20	Stevens Draw Reservoir	Sweetwater	70.92 acres	-
21	Hansen Lake	Sweetwater	53.39 acres	-
22	Stratton Lakes	Sweetwater	37.56 acres	-
23	Buffalo Hump Lake	Sweetwater	27.18 acres	-
24	Ringdahl Reservoir	Sweetwater	17 acres	-

Sources: Wyoming Game and Fish Department lake data; USGS. Verified October 30, 2026.