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

687 monitored lakes drain through the Lake Superior Basin (MN+WI), including Round Lake, Sunshine Lake, Ida Lake, and others. The watershed spans Minnesota and Wisconsin.

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

Round 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 · 687 monitored lakes · 178 grade A · 199 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.

Reviewed by LakeQuality Editorial Team · Updated Jul 20, 2026

Counties in this watershed

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

Monitored Lakes (687)

#	Lake	County	Grade	Clarity	Area	Depth
1	Round Lake	Cook	A	16.5 ft	154 acres	45 ft
2	Sunshine Lake	St. Louis	A	20 ft	79 acres	37 ft
3	Ida Lake	Douglas	A	16.4 ft	4,445 acres	106 ft
4	Jenny Lake	Lake	A	15.5 ft	102 acres	93 ft
5	Birch Lake	Cook	A	18 ft	236 acres	69 ft
6	Gull Lake	Cook	A	15.5 ft	-	-
7	Clearwater Lake	Cook	A	29 ft	462 acres	65 ft
8	Clearwater Lake	Lake	A	18 ft	640 acres	46 ft
9	Latoka Lake	Douglas	A	19 ft	767 acres	108 ft
10	Pike Lake	Cook	A	17.4 ft	814 acres	45 ft
11	Pike Lake	St. Louis	A	18 ft	488 acres	60 ft
12	Trout Lake	Cook	A	18.4 ft	259 acres	77 ft
13	Eddy Lake	Lake	A	17 ft	122 acres	95 ft
14	Cowdry Lake	Douglas	A	17.1 ft	243 acres	52 ft
15	Bear Lake	Lake	A	17.4 ft	44 acres	31 ft
16	Tofte Lake	Lake	A	18.5 ft	134 acres	73 ft
17	Eagles Nest Lake	St. Louis	A	15.5 ft	1,028 acres	49 ft
18	Mukooda Lake	St. Louis	A	16.6 ft	774 acres	78 ft
19	Ottertrack Lake	Lake	A	20 ft	113 acres	70 ft
20	Miltona Lake	Douglas	A	18.7 ft	5,731 acres	105 ft
21	Silver Lake	St. Louis	A	19.3 ft	46 acres	29 ft
22	Mina Lake	Douglas	A	16 ft	411 acres	123 ft
23	Knife Lake	Lake	A	20 ft	105 acres	-
24	Hanson Lake	Lake	A	18 ft	289 acres	100 ft
25	Pine Lake	Cook	A	16.9 ft	2,122 acres	113 ft
26	Majestic Lake	St. Louis	A	15.3 ft	52 acres	51 ft
27	Schultz Lake	St. Louis	A	15.5 ft	210 acres	48 ft
28	Smith Lake	St. Louis	A	15 ft	193 acres	51 ft
29	Hungry Jack Lake	Cook	A	18 ft	474 acres	71 ft
30	Little Armstrong Lake	St. Louis	A	15.5 ft	70 acres	26 ft
31	Rose Lake	St. Louis	A	-	59 acres	31 ft
32	Duncan Lake	Cook	A	21.5 ft	477 acres	130 ft
33	Little Long Lake	St. Louis	A	21 ft	322 acres	45 ft
34	Leo Lake	Cook	A	15 ft	102 acres	28 ft
35	Burntside Lake	St. Louis	A	16 ft	7,314 acres	126 ft
36	Boot Lake	Lake	A	16.5 ft	197 acres	83 ft
37	Lone Lake	Cook	A	21 ft	-	-
38	Ahsub Lake	Lake	A	16.5 ft	60 acres	78 ft
39	Mayhew Lake	Cook	A	20.6 ft	221 acres	84 ft
40	Moon Lake	Douglas	A	21 ft	139 acres	38 ft
41	Whiskey Lake	Douglas	A	18.8 ft	160 acres	46 ft
42	Armstrong Lake	St. Louis	A	16.2 ft	382 acres	34 ft
43	Loon Lake	Cook	A	17.4 ft	1,095 acres	202 ft
44	Lost Lake	St. Louis	A	23 ft	124 acres	44 ft
45	Missionary Lake	Lake	A	16.5 ft	99 acres	71 ft
46	Stony Lake	Douglas	A	15.7 ft	87 acres	58 ft
47	Kekekabic Lake	Lake	A	19 ft	55 acres	130 ft
48	Majestic Lake	St. Louis	A	17.1 ft	52 acres	51 ft
49	Deep Lake	St. Louis	A	17.2 ft	73 acres	50 ft
50	St James Pit Lake	St. Louis	A	47.6 ft	124 acres	381 ft
51	Gunflint Lake	Cook	A	16.5 ft	4,009 acres	200 ft
52	St. Mary'S Lake	St. Louis	A	15 ft	234 acres	44 ft
53	Lottie Lake	Douglas	A	16.1 ft	46 acres	31 ft
54	Ely Lake	St. Louis	A	17.1 ft	723 acres	70 ft
55	Kemo Lake	Cook	A	17 ft	189 acres	65 ft
56	Flour Lake	Cook	A	18.2 ft	330 acres	75 ft
57	Moses Lake	Douglas	A	16.5 ft	824 acres	32 ft
58	Carlos Lake	Douglas	A	18 ft	2,605 acres	163 ft
59	Ahmakose Lake	Lake	A	18 ft	43 acres	68 ft
60	Vera Lake	Lake	A	18 ft	250 acres	55 ft
61	Ester Lake	Lake	A	18.8 ft	374 acres	110 ft
62	Cherry Lake	Lake	A	22 ft	19 acres	30 ft
63	Cruiser Lake	St. Louis	A	25.4 ft	118 acres	91 ft
64	Bearskin Lake	Cook	A	21 ft	509 acres	78 ft
65	Kek Lake	Lake	A	19.5 ft	55 acres	130 ft
66	Topaz Lake	Lake	A	17.6 ft	410 acres	110 ft
67	Peter Lake	Cook	A	22.5 ft	282 acres	120 ft
68	Gijikiki Lake	Lake	A	20.5 ft	113 acres	70 ft
69	Snowbank Lake	Lake	A	15.1 ft	4,655 acres	150 ft
70	Canoe Lake	Cook	A	20.5 ft	96 acres	40 ft
71	Amoeber Lake	Lake	A	18.8 ft	410 acres	110 ft
72	Stoney Lake	Douglas	A	19 ft	87 acres	58 ft
73	Indiana Lake	Lake	A	15.3 ft	143 acres	31 ft
74	Mcfarland Lake	Cook	A	17 ft	40 acres	-
75	North Union Lake	Douglas	A	20.3 ft	118 acres	42 ft
76	Parent Lake	Lake	A	18 ft	451 acres	50 ft
77	Greenwood Lake	Cook	A	15.1 ft	2,043 acres	112 ft
78	Little Gunflint Lake	Cook	A	16.2 ft	4,009 acres	200 ft
79	Rog Lake	Cook	A	19.6 ft	54 acres	40 ft
80	South Lake	Cook	A	26 ft	1,145 acres	140 ft
81	Superior Lake	Cook	A	15.1 ft	-	-
82	Superior Lake	St. Louis	A	-	-	-
83	Iron Chief Complex Lake	St. Louis	A	24.5 ft	207 acres	262.1 ft
84	West Pike Lake	Cook	A	19 ft	788 acres	120 ft
85	Merrill Lake	St. Louis	A	16 ft	-	-
86	Miner'S Pit West Lake	St. Louis	A	23.1 ft	141 acres	140 ft
87	Little Sandy Lake	St. Louis	A	-	-	-
88	Cabin Lake	Lake	A	-	66 acres	3 ft
89	Cramer Lake	Lake	A	-	68 acres	4 ft
90	Long Lake	Bayfield	A	16.2 ft	280 acres	28 ft
91	Samoset Lake	Bayfield	A	15 ft	43 acres	40 ft
92	Island Lake	Bayfield	A	17 ft	63 acres	51 ft
93	Eagle Lake	Bayfield	A	17 ft	163 acres	52 ft
94	Cable Lake	Bayfield	A	15.5 ft	-	-
95	Crystal Lake	Bayfield	A	16.2 ft	117 acres	29 ft
96	Upper Eau Claire Lake	Bayfield	A	18.7 ft	1,024 acres	92 ft
97	Millicent Lake	Bayfield	A	23 ft	-	-
98	Lower Eau Claire Lake	Bayfield	A	18.5 ft	784 acres	41 ft
99	Leader Lake	Douglas	A	15.3 ft	171 acres	56 ft
100	Hart Lake	Bayfield	A	21.5 ft	257 acres	54 ft