Mesotrophic Lakes in Wyoming

78 mesotrophic lakes in Wyoming. Moderate nutrients, good water quality.

Most well-managed working lakes register as mesotrophic — the band that balances productivity with clarity. 78 lakes in {{stateName}} sit in the mesotrophic band. About 0% are deep (50+ ft); the rest are shallower basins where watershed management keeps nutrients from pushing the system into eutrophy.

Mesotrophic lakes tend to grade B or C on the LakeGrade rubric — the productive-but-clear band lines up with the middle of the letter grades.

#	Lake	County	Grade	Clarity	Depth	TSI
1	Fontenelle Reservoir	Lincoln	A	15 ft	-	41
2	Atlantic Rim Reservoir	Carbon	A	-	-	43
3	Hanna Water Supply Lake	Carbon	A	-	-	43
4	Fontenelle Reservoir	Lincoln	A	13.3 ft	-	40
5	Fontenelle Reservoir Lower-Mid	Lincoln	A	11.8 ft	-	43
6	Seminoe Reservoir Lacustrine Pelagic	Carbon	A	17.1 ft	-	43
7	Viva Naughton Reservoir Lpd	Lincoln	A	12.3 ft	-	44
8	Kleenburn Pond	Sheridan	A	11.5 ft	-	43
9	Healy Reservoir	Johnson	A	15.3 ft	-	43
10	Bell Reservoir	Albany	A	10.3 ft	-	43
11	Lower Sunshine Reservoir	Park	A	10.6 ft	-	40
12	Nla Lake	Johnson	B	7.1 ft	-	44
13	Fontenelle Reservoir Caseknife Canyon	Lincoln	B	9.5 ft	-	45
14	Flaming Gorge Reservoir	Sweetwater	B	11.8 ft	-	42
15	Nla Lake	Albany	B	8.6 ft	-	45
16	Nla Lake	Albany	B	12.6 ft	-	45
17	Pathfinder Reservoir Lacustrine Pelagic	Natrona	B	10.7 ft	-	45
18	Alcova Reservoir Transitional Pelagic	Natrona	B	11.3 ft	-	45
19	Pathfinder Reservoir Transitional Pelagic	Natrona	B	11.1 ft	-	45
20	Seminoe Reservoir Transitional Littoral	Carbon	B	7.1 ft	-	43
21	Alcova Reservoir Lacustrine Pelagic	Natrona	B	12.8 ft	-	44
22	Pathfinder Reservoir Transitional Littoral	Natrona	B	7.7 ft	-	45
23	Seminoe Reservoir Transitional Pelagic	Carbon	B	11.4 ft	-	45
24	Keyhole Reservoir	Crook	B	10.6 ft	-	45
25	Lake Owen	Albany	B	8.1 ft	-	42
26	Muddy Guard Reservoir	Johnson	B	15.2 ft	-	46
27	Park Reservoir	Sheridan	B	10.8 ft	-	43
28	Upper New Fork Lake	Sublette	B	10.5 ft	-	43
29	Meadowlark Lake	Big Horn	B	11.7 ft	-	42
30	Lake Cameahwait	Fremont	B	11.6 ft	-	45
31	Boysen Reservoir	Fremont	B	11.5 ft	-	45
32	Boysen Reservoir Transitional Embayment	Fremont	B	11 ft	-	45
33	Colter South Dock Lake	Teton	B	12.2 ft	-	41
34	Lower Jade Lake	Fremont	B	-	-	47
35	Sodergreen Lake	Albany	B	-	-	47
36	Wallis Reservoir	Carbon	B	-	-	47
37	Sevenmile Lake	Albany	B	-	-	47
38	Phillips Lake	Albany	B	-	-	47
39	Upper Sunshine Reservoir Lpd	Park	B	-	-	47
40	Upper Sunshine Reservoir Rtpd	Park	B	-	-	47
41	Renner Reservoir D	Big Horn	B	-	-	47
42	Mortenson Lake D	Albany	B	-	-	47
43	Leazenby Lake D	Albany	B	-	-	47
44	Fontenelle Reservoir	Lincoln	B	-	-	47
45	Fontenelle Reservoir	Lincoln	B	-	-	47
46	Deaver Reservoir -D	Park	B	-	-	47
47	Hogan Reservoir	Park	B	-	-	47
48	Tippecanoe Reservoir -D	Park	B	-	-	47
49	Sawmill Reservoir D	Sheridan	B	-	-	47
50	Upper North Crow Reservoir	Laramie	B	-	-	47
51	Rawlins Peaking Reservoir	Carbon	B	-	-	47
52	Alcova Reservoir Transitional Littoral	Natrona	B	5.2 ft	-	48
53	Glendo Reservoir Lacustrine Embayment	Platte	B	7.4 ft	-	48
54	Seminoe Reservoir Pelagic	Carbon	B	8.5 ft	-	47
55	Pathfinder Reservoir Lacustrine Littoral	Natrona	B	7.8 ft	-	47
56	Glendo Reservoir Lacustrine Littoral	Platte	B	6.6 ft	-	49
57	Seminoe Reservoir Lacustrine Littoral	Carbon	B	11.7 ft	-	47
58	Seminoe Reservoir Riverine Littoral	Carbon	B	7.8 ft	-	47
59	Seminoe Reservoir Riverine Pelagic	Carbon	B	6.6 ft	-	49
60	Alcova Reservoir Lacustrine Littoral	Natrona	B	4.3 ft	-	50
61	Jim Bridger Pond	Sweetwater	B	4.9 ft	-	48
62	Fontenelle Reservoir	Lincoln	B	14.8 ft	-	46
63	Rock Lake	Platte	B	3.8 ft	-	49
64	Wheatland Reservoir	Platte	B	8.9 ft	-	46
65	Flaming Gorge-Green River Off Firehole Canyon Campground Lake	Sweetwater	B	4.4 ft	-	45
66	Keyhole Reservoir	Crook	B	7.7 ft	-	48
67	Sibley Lake	Sheridan	B	9.2 ft	-	46
68	Lake Hattie	Albany	B	8.4 ft	-	47
69	Jordan Reservoir	Platte	B	5 ft	-	46
70	Boysen Reservoir	Fremont	B	12.4 ft	-	47
71	Lower North Crow Reservoir	Laramie	B	9.4 ft	-	46
72	Blacks Fork Lake	Sweetwater	C	8.5 ft	-	46
73	Pathfinder Reservoir Riverine Pelagic	Carbon	C	5.9 ft	-	49
74	Rollins Reservoir	Uinta	C	6.2 ft	-	49
75	Camp Roberts Pond	Johnson	C	5.6 ft	-	50
76	Boysen Reservoir	Fremont	C	9.2 ft	-	49
77	Colter North Dock Lake	Teton	C	9.8 ft	-	44
78	Frye Lake	Fremont	C	8.4 ft	-	46

All mesotrophic 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.