Oligotrophic Lakes in Minnesota

482 oligotrophic lakes in Minnesota. Low nutrients, clear water, excellent for swimming.

#	Lake	County	Grade	Clarity	Depth	TSI
1	East Fox Lake	Crow Wing	A	16.1 ft	65 ft	37
2	Deep Portage Lake	Cass	A	15.4 ft	105 ft	38
3	Little Wabana Lake	Itasca	A	23.8 ft	57 ft	31
4	Clearwater Lake	Cook	A	30 ft	65 ft	26
5	Clearwater Lake	Lake	A	18 ft	46 ft	35
6	Lower Hay Lake	Crow Wing	A	19 ft	100 ft	38
7	Latoka Lake	Douglas	A	19 ft	108 ft	37
8	Bad Medicine Lake	Becker	A	25 ft	84 ft	30
9	Big Sugar Bush Lake	Becker	A	17 ft	42 ft	37
10	Fullers Lake: East Basin	Beltrami	A	49.2 ft	-	29
11	Birch Lake	Cook	A	18 ft	69 ft	35
12	Birch Lake	Unknown	A	15 ft	34 ft	38
13	Round Lake	Aitkin	A	15.3 ft	59 ft	38
14	Round Lake	Cook	A	16.5 ft	45 ft	36
15	Round Lake	Beltrami	A	59.1 ft	-	25
16	Pike Lake	Cook	A	17.8 ft	45 ft	33
17	Pike Lake	St. Louis	A	18 ft	60 ft	35
18	Horseshoe Lake	Cass	A	21 ft	51 ft	33
19	Long Lake	Clearwater	A	20 ft	80 ft	33
20	Long Lake	Cass	A	21.8 ft	115 ft	34
21	Long Lake	Beltrami	A	20 ft	87 ft	33
22	Long Lake	Becker	A	20 ft	61 ft	34
23	Long Lake	Cass	A	16.8 ft	37 ft	36
24	Long Lake	Beltrami	A	45.9 ft	-	28
25	Long Lake	Itasca	A	16.7 ft	72 ft	35
26	Long Lake	Itasca	A	16.9 ft	85 ft	37
27	Dead Lake	Hubbard	A	16 ft	34 ft	37
28	Unnamed Lake	Otter Tail	A	15.1 ft	95 ft	37
29	Maple Lake	Itasca	A	15.3 ft	39 ft	38
30	West Twin Lake	Crow Wing	A	19.8 ft	-	34
31	Sunshine Lake	St. Louis	A	20 ft	37 ft	34
32	Shallow Lake	Itasca	A	16.4 ft	85 ft	36
33	Trout Lake	Itasca	A	15.5 ft	135 ft	38
34	Trout Lake	Itasca	A	18 ft	157 ft	29
35	Trout Lake	Cook	A	19 ft	77 ft	35
36	Otter Lake	Otter Tail	A	18 ft	64 ft	35
37	Eddy Lake	Lake	A	16.5 ft	95 ft	37
38	Cowdry Lake	Douglas	A	17 ft	52 ft	40
39	Ossawinnamakee Lake	Crow Wing	A	20 ft	63 ft	36
40	Clear Lake	Crow Wing	A	18 ft	63 ft	34
41	Clear Lake	Aitkin	A	16 ft	24 ft	37
42	Clear Lake	Itasca	A	14.9 ft	30 ft	37
43	Bear Lake	Lake	A	17.4 ft	31 ft	36
44	Emerald Lake	Beltrami	A	31.2 ft	-	34
45	Blue Lake	Hubbard	A	17.4 ft	84 ft	34
46	Blue Lake	Crow Wing	A	19 ft	48 ft	35
47	Eagle Lake	Otter Tail	A	22.6 ft	46 ft	30
48	West Fox Lake	Crow Wing	A	15 ft	55 ft	39
49	Spearhead Lake	Hubbard	A	15 ft	81 ft	38
50	Ida Lake	Douglas	A	16.5 ft	106 ft	39
51	Star Lake	Crow Wing	A	19 ft	83 ft	37
52	Star Lake	Otter Tail	A	16.7 ft	94 ft	39
53	Upper Maple Lake	Wright	A	18 ft	76 ft	40
54	Partridge Lake	Crow Wing	A	16.2 ft	42 ft	37
55	Fish Lake	Otter Tail	A	17.8 ft	69 ft	38
56	Sand Lake	Cass	A	21 ft	54 ft	33
57	Jenny Lake	Lake	A	15.5 ft	93 ft	38
58	Roger Lake	Crow Wing	A	16 ft	64 ft	37
59	Hamlet Lake	Crow Wing	A	18.5 ft	88 ft	35
60	Square Lake	Washington	A	17 ft	68 ft	35
61	Shell Lake	Beltrami	A	42.7 ft	-	31
62	Tofte Lake	Lake	A	18.5 ft	73 ft	35
63	Andrusia Lake	Beltrami	A	15.5 ft	60 ft	40
64	Green Lake	Beltrami	A	60.7 ft	-	25
65	Green Lake	Beltrami	A	39.4 ft	-	31
66	Girl Lake	Cass	A	17 ft	81 ft	38
67	Charlotte Lake	Wright	A	17.1 ft	46 ft	38
68	Big Mcdonald Lake	Otter Tail	A	16.4 ft	46 ft	38
69	Bass Lake	Otter Tail	A	16.9 ft	-	40
70	Bass Lake	Crow Wing	A	16.1 ft	47 ft	37
71	Bass Lake	Itasca	A	18.2 ft	65 ft	35
72	Bass Lake	Cass	A	-	55 ft	36
73	Island Lake	Cass	A	15 ft	45 ft	39
74	Island Lake	Crow Wing	A	15.3 ft	76 ft	39
75	Island Lake	Cass	A	17.5 ft	40 ft	35
76	Island Lake	Beltrami	A	52.5 ft	-	29
77	Island Lake	Hubbard	A	16.4 ft	32 ft	37
78	Crooked Lake	Hubbard	A	19.2 ft	-	34
79	Crooked Lake	Crow Wing	A	15 ft	54 ft	38
80	Portage Lake	Cass	A	22.8 ft	84 ft	32
81	Cedar Lake	Morrison	A	16.4 ft	88 ft	38
82	Big Pine Lake	Aitkin	A	16.5 ft	78 ft	40
83	Lizzie Lake	Otter Tail	A	16.4 ft	66 ft	39
84	Eagles Nest Lake	St. Louis	A	15.5 ft	49 ft	38
85	Turtle Lake	Becker	A	23 ft	73 ft	33
86	Turtle Lake	Itasca	A	17.1 ft	54 ft	35
87	Lower Bottle Lake	Hubbard	A	15 ft	110 ft	38
88	Pokegama Lake	Itasca	A	16 ft	112 ft	39
89	Sandy Lake	Beltrami	A	52.5 ft	-	27
90	Pickerel Lake	Becker	A	18 ft	74 ft	37
91	Pickerel Lake	Clearwater	A	16.1 ft	60 ft	36
92	Strawberry Lake	Becker	A	17.8 ft	40 ft	34
93	Middle Cormorant Lake	Becker	A	15.1 ft	40 ft	40
94	Mcavity Lake	Itasca	A	17 ft	29 ft	36
95	Gull Lake	Cook	A	16.4 ft	-	36
96	Upper Bottle Lake	Hubbard	A	16 ft	55 ft	38
97	Devil'S Lake	Otter Tail	A	15 ft	67 ft	40
98	Hand Lake	Cass	A	17 ft	57 ft	36
99	Ox Yoke Lake	Cass	A	17.5 ft	42 ft	36
100	Ottertrack Lake	Unknown	A	20.7 ft	116 ft	33

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