What lakes are in the Rum River Watershed?

114 monitored lakes drain through the Rum River Watershed, including Round Lake, Round Lake, Horseshoe Lake, and others. The watershed spans Minnesota.

What is the cleanest lake in the Rum River Watershed?

Round Lake in Aitkin County is the highest-rated lake in the Rum River Watershed 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 Rum River Watershed corresponds to HUC8 07010207.

Rum River Watershed, Lakes & Water Quality

The Rum River draining from Mille Lacs Lake south to the Mississippi — a State Wild and Scenic River with relatively undeveloped lake country.

Reviewed by LakeQuality Editorial Team · Updated Aug 2, 2026

Counties in this watershed

Mille Lacs, Aitkin, Kanabec, Isanti, Anoka

Monitored Lakes (114)

#	Lake	County	Grade	Clarity	Area	Depth
1	Round Lake	Aitkin	A	14.5 ft	737 acres	125 ft
2	Round Lake	Anoka	A	8.9 ft	-	-
3	Horseshoe Lake	Isanti	A	3.5 ft	-	-
4	Clear Lake	Aitkin	A	15 ft	574 acres	24 ft
5	Spectacle Lake	Isanti	A	13.8 ft	246 acres	51.5 ft
6	Cedar Lake	Aitkin	A	11.1 ft	1,726 acres	105 ft
7	Big Pine Lake	Aitkin	A	17 ft	638 acres	78 ft
8	Upper Birch Lake	Isanti	A	10.8 ft	-	-
9	East Twin Lake	Anoka	A	10.7 ft	92 acres	68 ft
10	Howard Lake	Anoka	A	3.3 ft	-	-
11	Lower Birch Lake	Isanti	A	7.4 ft	-	-
12	Farm Island Lake	Aitkin	A	11.3 ft	2,005 acres	56 ft
13	Hoffman Lake	Isanti	A	3.7 ft	-	-
14	Horseleg Lake	Isanti	A	3.6 ft	-	-
15	Grass Lake	Anoka	A	4.3 ft	-	-
16	Netta Lake	Anoka	A	11.3 ft	-	-
17	Laddie Lake	Anoka	A	-	66 acres	4 ft
18	Ml-Nw Lake	Aitkin	A	9.4 ft	128,250 acres	42 ft
19	Ml-Seventeen Lake	Aitkin	A	6.2 ft	128,250 acres	42 ft
20	Ml-Vineland Lake	Mille Lacs	A	7.8 ft	128,250 acres	42 ft
21	Ml-Malone Lake	Mille Lacs	A	5.7 ft	128,250 acres	42 ft
22	Ml-Ne Lake	Aitkin	A	8.6 ft	128,250 acres	42 ft
23	Outlet of Onamia Lake on the Rum River	Mille Lacs	A	-	1,044 acres	10 ft
24	Crooked Lake	Anoka	C	7.1 ft	115 acres	26 ft
25	George Lake	Anoka	C	7.3 ft	489 acres	32 ft
26	Skogman Lake	Isanti	C	5.4 ft	228 acres	36 ft
27	Minnewawa Lake	Aitkin	C	5 ft	2,351 acres	21 ft
28	Big Sandy Lake	Aitkin	C	4.5 ft	6,125 acres	84 ft
29	Coon Lake	Anoka	C	5.7 ft	1,481 acres	27 ft
30	Pine Lake	Aitkin	C	6.5 ft	378 acres	28 ft
31	Ham Lake	Anoka	C	8.9 ft	155 acres	22 ft
32	Boot Lake	Anoka	C	6.7 ft	91 acres	19 ft
33	Amelia Lake	Anoka	C	3.9 ft	-	-
34	Ripple Lake	Aitkin	C	4.5 ft	630 acres	39 ft
35	Moore Lake	Anoka	C	3.9 ft	68 acres	5 ft
36	Ml-Thains Lake	Mille Lacs	C	5.3 ft	128,250 acres	42 ft
37	Ml-Ce Lake	Aitkin	C	9 ft	128,250 acres	42 ft
38	Ml-Se Lake	Mille Lacs	C	7.4 ft	128,250 acres	42 ft
39	Ml-Peterson Lake	Mille Lacs	C	7.4 ft	128,250 acres	42 ft
40	Ml-Garrison Lake	Aitkin	C	6.2 ft	128,250 acres	42 ft
41	Fannie Lake	Isanti	C	6.9 ft	360 acres	33 ft
42	Ml-Nshore Lake	Aitkin	C	7.4 ft	128,250 acres	42 ft
43	Outlet of Ogechie Lake on the Rum River	Mille Lacs	C	-	409 acres	6 ft
44	Horseshoe Lake	Aitkin	D	3.5 ft	240 acres	12 ft
45	Twin Lake	Isanti	D	2.5 ft	-	-
46	Elms Lake	Isanti	D	6.5 ft	52 acres	26 ft
47	Blue Lake	Isanti	D	8.9 ft	296 acres	31 ft
48	Green Lake	Isanti	D	4.7 ft	833 acres	28 ft
49	Rice Lake	Anoka	D	2.6 ft	-	-
50	Linwood Lake	Anoka	D	3.9 ft	572 acres	42 ft
51	Martin Lake	Anoka	D	2.5 ft	232 acres	20 ft
52	Flowage Lake	Aitkin	D	2.1 ft	-	-
53	Golden Lake	Anoka	D	4.5 ft	58 acres	25 ft
54	Locke Lake	Anoka	D	3 ft	23 acres	-
55	Lory Lake	Isanti	D	6 ft	222 acres	21 ft
56	Reshanau Lake	Anoka	D	3.1 ft	337 acres	16 ft
57	Little Stanchfield Lake	Isanti	D	3.5 ft	146 acres	12 ft
58	Peltier Lake	Anoka	F	2.5 ft	552 acres	18 ft
59	Sandy Lake	Anoka	F	2.1 ft	-	-
60	Typo Lake	Anoka	F	1 ft	298 acres	6 ft
61	Ann Lake	Kanabec	F	2 ft	653 acres	17 ft
62	Knife Lake	Kanabec	F	2 ft	1,259 acres	15 ft
63	Francis Lake	Isanti	F	2 ft	269 acres	7 ft
64	Centerville Lake	Anoka	F	3.9 ft	474 acres	19 ft
65	South Stanchfield Lake	Isanti	F	2.5 ft	411 acres	17 ft
66	North Stanchfield Lake	Isanti	F	2.8 ft	157 acres	11 ft
67	Round Lake	Aitkin	NR	14.5 ft	554 acres	27 ft
68	Round Lake	Aitkin	NR	14.5 ft	634 acres	59 ft
69	Long Lake	Aitkin	NR	10.8 ft	435 acres	116 ft
70	Fish Lake	Kanabec	NR	2 ft	506 acres	8 ft
71	Bachelor Lake	Aitkin	NR	14 ft	54 acres	47 ft
72	Florence Lake	Isanti	NR	8.9 ft	135 acres	26 ft
73	Bass Lake	Aitkin	NR	5 ft	57 acres	58 ft
74	Island Lake	Aitkin	NR	7 ft	244 acres	25 ft
75	Portage Lake	Aitkin	NR	4.5 ft	372 acres	18 ft
76	Mille Lacs Lake	Aitkin	NR	10 ft	128,250 acres	42 ft
77	Mille Lacs Lake	Mille Lacs	NR	9 ft	128,250 acres	42 ft
78	Cedar Lake	Aitkin	NR	8.8 ft	249 acres	18 ft
79	Pickerel Lake	Anoka	NR	5 ft	-	-
80	Devil'S Lake	Kanabec	NR	7.3 ft	59 acres	19 ft
81	Lewis Lake	Kanabec	NR	7 ft	179 acres	48 ft
82	Silver Lake	Mille Lacs	NR	1 ft	-	-
83	Blind Lake	Aitkin	NR	5.5 ft	304 acres	17 ft
84	Wilkins Lake	Aitkin	NR	13 ft	349 acres	39 ft
85	Brown Lake	Aitkin	NR	7 ft	68 acres	28 ft
86	Rabbit Lake	Aitkin	NR	9.3 ft	212 acres	51 ft
87	Fleming Lake	Aitkin	NR	5.2 ft	319 acres	15 ft
88	Hanging Kettle Lake	Aitkin	NR	6.5 ft	318 acres	35 ft
89	Wolf Lake	Aitkin	NR	3.5 ft	173 acres	31 ft
90	Vanduse Lake	Aitkin	NR	11 ft	240 acres	27 ft
91	Hammal Lake	Aitkin	NR	12.5 ft	376 acres	44 ft
92	Waukenabo Lake	Aitkin	NR	8 ft	668 acres	38 ft
93	Esquagamah Lake	Aitkin	NR	5 ft	842 acres	31 ft
94	Rat Lake	Aitkin	NR	5.5 ft	431 acres	21 ft
95	Lone Lake	Aitkin	NR	22.5 ft	433 acres	60 ft
96	Elm Island Lake	Aitkin	NR	4 ft	520 acres	25 ft
97	Pomroy Lake	Kanabec	NR	5.5 ft	412 acres	11 ft
98	Loon Lake	Aitkin	NR	4 ft	34 acres	21 ft
99	Sugar Lake	Aitkin	NR	14.5 ft	416 acres	45 ft
100	Wakefield Lake	Aitkin	NR	7.6 ft	164 acres	69 ft