What lakes are in the Lake Superior Basin (MN+WI)?

676 monitored lakes drain through the Lake Superior Basin (MN+WI), including Clearwater Lake, Clearwater Lake, Latoka Lake, and others. The watershed spans Minnesota and Wisconsin.

What is the cleanest lake in the Lake Superior Basin (MN+WI)?

Clearwater Lake in Cook County is the highest-rated lake in the Lake Superior Basin (MN+WI) with a Grade A.

What is a HUC8 watershed?

HUC8 (Hydrologic Unit Code, 8-digit) is the USGS classification for "subbasins" — the level at which major named river systems are usually identified. The Lake Superior Basin (MN+WI) corresponds to HUC8 04010102.

Lake Superior Basin (MN+WI)

Minnesota and Wisconsin · 676 monitored lakes · 186 grade A · 192 grade B · HUC8 04010102

Lakes draining north into Lake Superior across the Arrowhead region of Minnesota and northern Wisconsin — including the Boundary Waters Canoe Area Wilderness lakes.

Counties in this watershed

Cook, Lake, St. Louis, Carlton, Douglas, Bayfield, Ashland, Iron

Monitored Lakes (676)

#	Lake	County	Grade	Clarity	Area	Depth
1	Clearwater Lake	Cook	A	30 ft	-	-
2	Clearwater Lake	Lake	A	18 ft	-	-
3	Latoka Lake	Douglas	A	19 ft	-	-
4	Birch Lake	Cook	A	18 ft	-	-
5	Round Lake	Cook	A	16.5 ft	-	-
6	Pike Lake	Cook	A	17.8 ft	-	-
7	Pike Lake	St. Louis	A	18 ft	-	-
8	Sunshine Lake	St. Louis	A	20 ft	-	-
9	Trout Lake	Cook	A	19 ft	-	-
10	Chippewa Lake	Douglas	A	15.1 ft	-	-
11	Eddy Lake	Lake	A	16.5 ft	-	-
12	Cowdry Lake	Douglas	A	17 ft	-	-
13	Bear Lake	Lake	A	17.4 ft	-	-
14	Ida Lake	Douglas	A	16.5 ft	4.4K acres	-
15	Jenny Lake	Lake	A	15.5 ft	-	-
16	Tofte Lake	Lake	A	18.5 ft	-	-
17	Eagles Nest Lake	St. Louis	A	15.5 ft	-	-
18	Mukooda Lake	St. Louis	A	16.6 ft	-	-
19	Gull Lake	Cook	A	16.4 ft	-	-
20	Miltona Lake	Douglas	A	18.8 ft	5.7K acres	-
21	Silver Lake	St. Louis	A	19.3 ft	-	-
22	Mina Lake	Douglas	A	16 ft	-	-
23	Knife Lake	Lake	A	20 ft	-	-
24	Majestic Lake	St. Louis	A	15.7 ft	-	-
25	Schultz Lake	St. Louis	A	15.5 ft	-	-
26	Hanson Lake	Lake	A	16 ft	-	-
27	Smith Lake	St. Louis	A	15 ft	220 acres	-
28	Hungry Jack Lake	Cook	A	18 ft	-	-
29	Pine Lake	Cook	A	18 ft	-	-
30	Little Armstrong Lake	St. Louis	A	15.5 ft	-	-
31	Little Long Lake	St. Louis	A	21 ft	-	-
32	Rose Lake	St. Louis	A	-	-	-
33	Leo Lake	Cook	A	15 ft	-	-
34	Duncan Lake	Cook	A	22 ft	-	-
35	Boot Lake	Lake	A	16.5 ft	-	-
36	Lone Lake	Cook	A	21 ft	-	-
37	Burntside Lake	St. Louis	A	16 ft	-	-
38	Ahsub Lake	Lake	A	18 ft	-	-
39	Whiskey Lake	Douglas	A	18.8 ft	-	-
40	Mayhew Lake	Cook	A	20.6 ft	-	-
41	Moon Lake	Douglas	A	20 ft	-	-
42	Armstrong Lake	St. Louis	A	16.2 ft	-	-
43	Loon Lake	Cook	A	18 ft	-	-
44	Dumbbell Lake	Lake	A	15.8 ft	-	-
45	Lost Lake	St. Louis	A	23 ft	-	-
46	Missionary Lake	Lake	A	17 ft	-	-
47	St James Pit Lake	St. Louis	A	47.6 ft	-	-
48	Stony Lake	Douglas	A	15.7 ft	-	-
49	Kekekabic Lake	Lake	A	19.3 ft	-	-
50	Majestic Lake	St. Louis	A	17.1 ft	-	-
51	St. Marys Lake	St. Louis	A	16.8 ft	-	-
52	Deep Lake	St. Louis	A	17.2 ft	-	-
53	Dix Lake	Lake	A	15.7 ft	-	-
54	Sabin Lake	St. Louis	A	35 ft	-	-
55	Gunflint Lake	Cook	A	20 ft	-	-
56	St. Mary'S Lake	St. Louis	A	15 ft	-	-
57	Lottie Lake	Douglas	A	16.1 ft	-	-
58	Ely Lake	St. Louis	A	16 ft	780 acres	-
59	Kemo Lake	Cook	A	17 ft	-	-
60	Flour Lake	Cook	A	18.5 ft	-	-
61	Moses Lake	Douglas	A	16.2 ft	824 acres	-
62	Carlos Lake	Douglas	A	17.2 ft	183 acres	-
63	Ahmakose Lake	Lake	A	18.5 ft	-	-
64	Vera Lake	Lake	A	19 ft	-	-
65	Cherry Lake	Lake	A	22 ft	-	-
66	Ester Lake	Lake	A	18.5 ft	-	-
67	Cruiser Lake	St. Louis	A	25.4 ft	-	-
68	Bearskin Lake	Cook	A	21.3 ft	-	-
69	Kek Lake	Lake	A	19.5 ft	-	-
70	Topaz Lake	Lake	A	17.5 ft	-	-
71	Peter Lake	Cook	A	22.5 ft	-	-
72	Kekekabic Pond 3	Lake	A	18 ft	-	-
73	Gijikiki Lake	Lake	A	19.3 ft	-	-
74	Canoe Lake	Cook	A	20.5 ft	-	-
75	Amoeber Lake	Lake	A	18 ft	-	-
76	Stoney Lake	Douglas	A	19 ft	-	-
77	Indiana Lake	Lake	A	15 ft	-	-
78	Su18 Lake	Cook	A	38.7 ft	-	-
79	Mcfarland Lake	Cook	A	17 ft	-	-
80	Whitewater Lake	St. Louis	A	15.4 ft	1.2K acres	-
81	Su19 Lake	Cook	A	37.7 ft	-	-
82	North Union Lake	Douglas	A	20.3 ft	-	-
83	Parent Lake	Lake	A	23 ft	-	-
84	16-0023-00 Lake	Cook	A	17 ft	-	-
85	Little Gunflint Lake	Cook	A	16.2 ft	-	-
86	Rog Lake	Cook	A	26.2 ft	-	-
87	16-0524-00 Lake	Cook	A	15 ft	-	-
88	Superior Lake	Cook	A	15.1 ft	-	-
89	Superior Lake	St. Louis	A	-	-	-
90	38-0502-00 Lake	Lake	A	21 ft	-	-
91	Iron Chief Complex Lake	St. Louis	A	24.5 ft	-	-
92	West Pike Lake	Cook	A	19 ft	-	-
93	Little Sandy Lake	St. Louis	A	-	-	-
94	Cramer Lake	Lake	A	-	-	-
95	Cabin Lake	Lake	A	-	-	-
96	Suseq32a Lake	St. Louis	A	-	-	-
97	Ls94 Lake	Lake	A	-	-	-
98	Seq044a Lake	Lake	A	-	-	-
99	Suseq44a Lake	Lake	A	-	-	-
100	Seq032a Lake	St. Louis	A	-	-	-

Showing top 100 of 676 lakes by water quality grade.

All watersheds →All Minnesota lakes →All Wisconsin lakes →

Source: EPA National Aquatic Resource Surveys, 2026.