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

686 monitored lakes drain through the Lake Superior Basin (MN+WI), including Lobster 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)?

Lobster Lake in Douglas 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), Lakes & Water Quality

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

Reviewed by LakeQuality Editorial Team · Updated Aug 2, 2026

Counties in this watershed

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

Monitored Lakes (686)

#	Lake	County	Grade	Clarity	Area	Depth
1	Lobster Lake	Douglas	A	13 ft	1,334 acres	65 ft
2	Clearwater Lake	Cook	A	29 ft	462 acres	65 ft
3	Latoka Lake	Douglas	A	19 ft	767 acres	108 ft
4	Big Lake	Carlton	A	10 ft	526 acres	25 ft
5	Big Lake	St. Louis	A	8.2 ft	1,904 acres	22 ft
6	Birch Lake	Cook	A	18 ft	236 acres	69 ft
7	Round Lake	Cook	A	16.5 ft	154 acres	45 ft
8	Pike Lake	Cook	A	17.4 ft	814 acres	45 ft
9	Farm Lake	Lake	A	5.5 ft	1,292 acres	56 ft
10	Maple Lake	Douglas	A	14.1 ft	831 acres	78 ft
11	West Twin Lake	Cook	A	9.8 ft	134 acres	37 ft
12	Trout Lake	Cook	A	18.4 ft	259 acres	77 ft
13	South Sturgeon Lake	St. Louis	A	2.5 ft	204 acres	43 ft
14	Chippewa Lake	Douglas	A	14.8 ft	1,186 acres	95 ft
15	Cowdry Lake	Douglas	A	17.1 ft	243 acres	52 ft
16	Garden Lake	Lake	A	5 ft	653 acres	55 ft
17	Bear Lake	Lake	A	17.4 ft	44 acres	31 ft
18	Vermont Lake	Douglas	A	14.1 ft	342 acres	59 ft
19	Darling Lake	Douglas	A	14 ft	1,050 acres	62 ft
20	Colby Lake	St. Louis	A	3 ft	518 acres	30 ft
21	Ida Lake	Douglas	A	16.4 ft	4,445 acres	106 ft
22	Island Lake	St. Louis	A	14.5 ft	222 acres	65 ft
23	Crooked Lake	Douglas	A	14 ft	284 acres	35 ft
24	Crooked Lake	Lake	A	3 ft	60 acres	4 ft
25	Portage Lake	Cook	A	8.5 ft	128 acres	55 ft
26	White Iron Lake	Lake	A	4.5 ft	3,237 acres	47 ft
27	Gull Lake	Cook	A	15.5 ft	-	-
28	Miltona Lake	Douglas	A	18.7 ft	5,731 acres	105 ft
29	Silver Lake	St. Louis	A	19.3 ft	46 acres	29 ft
30	Caribou Lake	Cook	A	6.9 ft	68 acres	6 ft
31	Mary Lake	Douglas	A	10.5 ft	2,450 acres	40 ft
32	Devil Track Lake	Cook	A	7 ft	1,876 acres	50 ft
33	Pleasant Lake	St. Louis	A	10 ft	335 acres	33 ft
34	Poplar Lake	Cook	A	10.2 ft	23 acres	30 ft
35	Deer Yard Lake	Cook	A	7.2 ft	343 acres	20 ft
36	East Twin Lake	St. Louis	A	2.8 ft	-	-
37	Elbow Lake	Cook	A	3.7 ft	408 acres	9 ft
38	Fall Lake	Lake	A	5.5 ft	2,258 acres	32 ft
39	Perch Lake	St. Louis	A	13.5 ft	344 acres	30 ft
40	Le Homme Dieu Lake	Douglas	A	13.1 ft	1,801 acres	85 ft
41	Side Lake	St. Louis	A	11.5 ft	368 acres	32 ft
42	Hungry Jack Lake	Cook	A	18 ft	474 acres	71 ft
43	Pine Lake	St. Louis	A	7.5 ft	450 acres	14 ft
44	Tom Lake	Cook	A	9 ft	404 acres	35 ft
45	Geneva Lake	Douglas	A	14.1 ft	640 acres	63 ft
46	Cedar Island Lake	St. Louis	A	3.8 ft	-	-
47	Tait Lake	Cook	A	7 ft	355 acres	15 ft
48	Sturgeon Lake	St. Louis	A	13.8 ft	1,585 acres	79.8 ft
49	Rachel Lake	Douglas	A	7.9 ft	448 acres	65 ft
50	Rose Lake	St. Louis	A	-	59 acres	31 ft
51	Burntside Lake	St. Louis	A	16 ft	7,314 acres	126 ft
52	Andrew Lake	Douglas	A	13.9 ft	923 acres	83 ft
53	Sea Gull Lake	Cook	A	14.3 ft	168 acres	40 ft
54	Mayhew Lake	Cook	A	20.6 ft	221 acres	84 ft
55	Moon Lake	Douglas	A	21 ft	139 acres	38 ft
56	Loon Lake	Cook	A	17.4 ft	1,095 acres	202 ft
57	Dodo Lake	St. Louis	A	12.8 ft	92 acres	53 ft
58	Dumbbell Lake	Lake	A	14.8 ft	406 acres	40 ft
59	St. Marys Lake	St. Louis	A	13.1 ft	234 acres	44 ft
60	Stewart Lake	Lake	A	10 ft	238 acres	20 ft
61	Sabin Lake	St. Louis	A	2.1 ft	279 acres	52 ft
62	Bear Island Lake	St. Louis	A	7 ft	2,362 acres	62 ft
63	Gunflint Lake	Cook	A	16.5 ft	4,009 acres	200 ft
64	Nichols Lake	St. Louis	A	5.1 ft	419 acres	31 ft
65	Lottie Lake	Douglas	A	16.1 ft	46 acres	31 ft
66	Third Lake	Carlton	A	8.5 ft	-	-
67	Ely Lake	St. Louis	A	17.1 ft	723 acres	70 ft
68	Flour Lake	Cook	A	18.2 ft	330 acres	75 ft
69	Carlos Lake	Douglas	A	18 ft	2,605 acres	163 ft
70	Murphy Lake	St. Louis	A	6.4 ft	354 acres	24 ft
71	Wynne Lake	St. Louis	A	7.3 ft	279 acres	52 ft
72	Pat Martin Lake	Carlton	A	6.6 ft	-	-
73	Two Island Lake	Cook	A	9 ft	754 acres	27 ft
74	Brophy Lake	Douglas	A	15.4 ft	297 acres	44 ft
75	Burgen Lake	Douglas	A	12 ft	174 acres	43 ft
76	Park Lake	Carlton	A	7 ft	381 acres	16 ft
77	Cadotte Lake	St. Louis	A	10.2 ft	294 acres	18 ft
78	Bearskin Lake	Cook	A	21 ft	509 acres	78 ft
79	South Oscar Lake	Douglas	A	16.7 ft	-	-
80	Isabella Lake	Lake	A	4.4 ft	1,257 acres	19 ft
81	Stoney Lake	Douglas	A	19 ft	87 acres	58 ft
82	Turtle Lake Deep	Cook	A	-	-	-
83	Mcfarland Lake	Cook	A	17 ft	40 acres	8 ft
84	Fenske Lake	St. Louis	A	11.5 ft	108 acres	43 ft
85	Whitewater Lake	St. Louis	A	14 ft	1,212 acres	73 ft
86	Ward Lake	Cook	A	5.6 ft	39 acres	13 ft
87	Bear Head Lake	St. Louis	A	11 ft	662 acres	46 ft
88	Louise Lake	Douglas	A	14.5 ft	214 acres	33 ft
89	Clara Lake	Cook	A	7.6 ft	388 acres	15 ft
90	North Union Lake	Douglas	A	20.3 ft	118 acres	42 ft
91	Saganaga Lake	Cook	A	13 ft	-	-
92	Greenwood Lake	Cook	A	15.1 ft	2,043 acres	112 ft
93	Dunnigan Lake	Lake	A	11.4 ft	81 acres	14 ft
94	Taylor Lake Deep	Cook	A	10.6 ft	-	-
95	Tetagouche Lake	Lake	A	7.2 ft	67 acres	20 ft
96	Trout Lake Deep	Cook	A	10.7 ft	-	-
97	Bean Lake	Lake	A	9.8 ft	31 acres	26 ft
98	Teal Lake Deep	Cook	A	4.1 ft	-	-
99	Little Lake Deep	Cook	A	4.9 ft	-	-
100	North Lake Deep	Cook	A	-	-	-