Eutrophic Lakes in Wyoming

102 eutrophic lakes in Wyoming. High nutrients, frequent algae, reduced clarity.

Eutrophic lakes — TSI 50 to 70 — are nutrient-rich and productive, with persistent summer algal communities that drive visible reductions in clarity. These conditions are not failures; they reflect a lake doing what nutrient-loaded waters do. 102 {{stateName}} lakes register as eutrophic. Only 0% are deep — eutrophy correlates with shallowness, agricultural watersheds, and the kind of nutrient-input history that takes decades to shift.

Eutrophic lakes typically grade C or D on the LakeGrade rubric. The same nutrient richness that defines the trophic class drives the lower grade.

#	Lake	County	Grade	Clarity	Depth	TSI
1	Pine Cone Reservoir D	Carbon	B	-	-	51
2	Fontenelle Reservoir	Lincoln	B	-	-	51
3	Piedmont Reservoir D	Uinta	B	-	-	51
4	Nla Lake	Sublette	B	35.4 ft	-	64
5	Nla Lake	Carbon	B	19.5 ft	-	65
6	Nla Lake	Teton	B	38.1 ft	-	59
7	Nla Lake	Johnson	B	31 ft	-	64
8	Glendo Reservoir Transitional Littoral	Platte	C	3.7 ft	-	53
9	Pathfinder Reservoir Riverine Pelagic	Natrona	C	4.4 ft	-	53
10	Glendo Reservoir Lacustrine Pelagic	Platte	C	5.2 ft	-	50
11	Sulphur Creek Reservoir	Uinta	C	3.1 ft	-	52
12	Greyrocks Reservoir	Platte	C	5.4 ft	-	50
13	Guernsey Reservoir	Platte	C	4.9 ft	-	51
14	Boysen Reservoir	Fremont	C	8.1 ft	-	52
15	Brooks Lake	Fremont	C	6.7 ft	-	51
16	Lake Absarraca	Laramie	C	3.4 ft	-	53
17	Brooks Lake Creek	Fremont	C	-	-	61
18	Brooks Lake	Fremont	C	-	-	61
19	Lower Jade Lake Littoral	Fremont	C	-	-	53
20	Brooks Lake	Fremont	C	-	-	61
21	Seminoe Reservoir	Carbon	C	-	-	57
22	A And M Reservoir	Sweetwater	C	-	-	53
23	Pilot Butte Reservoir Lpd	Fremont	C	-	-	53
24	Teton Reservoir	Carbon	C	-	-	61
25	Campbell Lake	Albany	C	-	-	62
26	Saratoga Reservoir	Carbon	C	-	-	57
27	Alsop Lake	Albany	C	-	-	61
28	Pilot Butte Reservoir Rtpd	Fremont	C	-	-	61
29	Buffalo Bill Reservoir Transitional Littoral	Park	C	-	-	61
30	Sederlin Lake	Carbon	C	-	-	61
31	Gelatt Lake	Albany	C	-	-	53
32	Buffalo Bill Reservoir Lacustrine Pelagic	Park	C	-	-	62
33	Crompton Reservoir D	Uinta	C	-	-	59
34	Osterman Lake D	Albany	C	-	-	53
35	Wakan Tanka Lake D	Carbon	C	-	-	59
36	East Newton Lake D	Park	C	-	-	57
37	Foote Creek Lake D	Albany	C	-	-	57
38	Meeboer Lake D	Albany	C	-	-	57
39	Fontenelle Reservoir	Lincoln	C	-	-	53
40	Wardell Reservoir -D	Big Horn	C	-	-	61
41	South Crow Reservoir	Laramie	C	-	-	53
42	Nla Lake	Natrona	C	5.1 ft	-	57
43	Nla Lake	Fremont	C	-	-	62
44	Seminoe Reservoir Riverine Pelagic	Carbon	C	4.4 ft	-	55
45	Alcova Reservoir Riverine Littoral	Natrona	C	3.4 ft	-	57
46	Pathfinder Reservoir Riverine Littoral	Carbon	C	4.6 ft	-	54
47	Alcova Reservoir Riverine Pelagic	Natrona	C	5.8 ft	-	52
48	Pathfinder Reservoir Riverine Littoral	Natrona	C	3.7 ft	-	56
49	Kemmerer City Reservoir	Lincoln	C	6 ft	-	55
50	Graham Reservoir	Uinta	C	2.4 ft	-	56
51	Fontenelle Reservoir	Lincoln	C	3.6 ft	-	56
52	Glendo Reservoir Transitional Pelagic	Platte	C	5.3 ft	-	53
53	Ocean Lake	Fremont	C	2.2 ft	-	58
54	Brooks Lake	Fremont	C	6.3 ft	-	56
55	Boysen Reservoir	Fremont	C	4.5 ft	-	56
56	Bighorn Lake	Big Horn	C	-	-	62
57	Nla Lake	Park	D	9.8 ft	-	60
58	Glendo Reservoir Riverine Embayment	Platte	D	2.7 ft	-	62
59	Blacks Fork Inflow Lake	Sweetwater	D	5.2 ft	-	53
60	Hawk Springs Reservoir	Goshen	D	1.1 ft	-	68
61	Sloans Lake	Laramie	D	2 ft	-	63
62	Keyhole Reservoir	Crook	D	2.5 ft	-	61
63	Sundance Fairgrounds Pond	Crook	D	4.1 ft	-	57
64	Mavrakis Pond	Sheridan	D	0.9 ft	-	69
65	Boysen Reservoir	Fremont	D	2.5 ft	-	60
66	Brooks Lake	Fremont	D	6.7 ft	-	59
67	Brooks Lake	Fremont	D	6.2 ft	-	59
68	Leeks Marina Lake	Teton	D	3.4 ft	-	59
69	Upper Brooks Lake	Fremont	D	-	-	65
70	Brooks Lake	Fremont	D	-	-	65
71	Lower Jade Lake Outlet	Fremont	D	-	-	65
72	Lower Jade Lake Inlet	Fremont	D	-	-	67
73	Upper Brooks Lake	Fremont	D	-	-	67
74	Brooks Lake Inlet	Fremont	D	-	-	65
75	Upper Brooks Lake Pelagic	Fremont	D	-	-	67
76	Buffalo Bill Reservoir Lacustrine Littoral	Park	D	-	-	63
77	Wheatland Reservoir Lpd	Albany	D	-	-	67
78	Buffalo Bill Reservoir Transitional Littoral	Park	D	-	-	64
79	Little Sage Creek Reservoir	Carbon	D	-	-	66
80	Twin Butte Reservoir	Albany	D	-	-	64
81	Buffalo Bill Reservoir Transitional Pelagic	Park	D	-	-	65
82	Buffalo Bill Reservoir Riverine Littoral	Park	D	-	-	63
83	Buffalo Bill Reservoir Riverine Littoral	Park	D	-	-	64
84	Pilger Lake D	Albany	D	-	-	63
85	Soda Lake D	Albany	D	-	-	63
86	West Carroll Lake D	Albany	D	-	-	63
87	East Allen Lake D	Carbon	D	-	-	63
88	Shirley Basin Reservoir D	Carbon	D	-	-	67
89	Elk Mountain Reservoir D	Carbon	D	-	-	67
90	City Reservoir	Park	D	-	-	64
91	Yellowtail Reservoir Tpd	Big Horn	D	-	-	66
92	Mayland Pond	Big Horn	D	-	-	63
93	Rawlins Reservoir	Carbon	D	-	-	63
94	Nla Lake	Albany	D	1.8 ft	-	64
95	Glendo Reservoir Riverine Pelagic	Platte	D	1.4 ft	-	68
96	Buffalo Bill Reservoir Transitional Pelagic	Park	D	2.8 ft	-	64
97	Brooks Lake	Fremont	D	6 ft	-	60
98	Fontenelle Reservoir Green River Inflow	Lincoln	F	3.1 ft	-	61
99	Beck Lake D	Park	F	-	-	69
100	Buffalo Bill Reservoir	Park	F	-	-	70

All eutrophic lakes →Minnesota version →Wisconsin version →Illinois version →Michigan version →Iowa version →Ohio version →Pennsylvania version →New York version →Missouri version →Indiana version →North Dakota version →South Dakota version →Florida version →Colorado version →North Carolina version →Vermont version →Texas version →Oregon version →Arkansas version →Oklahoma version →Kansas version →Nebraska version →Nevada version →Arizona version →Idaho version →Montana version →New Mexico version →Tennessee version →Alabama version →Virginia version →Kentucky version →Utah version →Washington version →All Wyoming lakes →

Source: EPA National Aquatic Resource Surveys, 2026.