What lakes are in the St. Croix Watershed?

378 monitored lakes drain through the St. Croix Watershed, including Lobster Lake, Latoka Lake, Maple Lake, and others. The watershed spans Minnesota and Wisconsin.

What is the cleanest lake in the St. Croix Watershed?

Lobster Lake in Douglas County is the highest-rated lake in the St. Croix 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 St. Croix Watershed corresponds to HUC8 07030005.

St. Croix Watershed, Lakes & Water Quality

The St. Croix River basin straddling the Minnesota–Wisconsin border, one of the cleanest large-river watersheds in the Upper Midwest and a National Scenic Riverway.

Reviewed by LakeQuality Editorial Team · Updated Aug 2, 2026

Counties in this watershed

Pine, Chisago, Washington, Polk, Burnett, St. Croix, Douglas

Monitored Lakes (378)

#	Lake	County	Grade	Clarity	Area	Depth
1	Lobster Lake	Douglas	A	13 ft	1,334 acres	65 ft
2	Latoka Lake	Douglas	A	19 ft	767 acres	108 ft
3	Maple Lake	Douglas	A	14.1 ft	831 acres	78 ft
4	Chippewa Lake	Douglas	A	14.8 ft	1,186 acres	95 ft
5	Twin Lake	Washington	A	13 ft	-	-
6	Cowdry Lake	Douglas	A	17.1 ft	243 acres	52 ft
7	Clear Lake	Washington	A	14 ft	42 acres	27 ft
8	Vermont Lake	Douglas	A	14.1 ft	342 acres	59 ft
9	Darling Lake	Douglas	A	14 ft	1,050 acres	62 ft
10	Ida Lake	Douglas	A	16.4 ft	4,445 acres	106 ft
11	Fish Lake	Chisago	A	9.4 ft	319 acres	57 ft
12	Union Lake	Polk	A	15 ft	-	-
13	Square Lake	Washington	A	17 ft	203 acres	68 ft
14	Crooked Lake	Douglas	A	14 ft	284 acres	35 ft
15	Spider Lake	Chisago	A	6.5 ft	131 acres	9 ft
16	Miltona Lake	Douglas	A	18.7 ft	5,731 acres	105 ft
17	Big Marine Lake	Washington	A	12 ft	-	-
18	Mary Lake	Douglas	A	10.5 ft	2,450 acres	40 ft
19	Poplar Lake	Polk	A	8.9 ft	90 acres	23 ft
20	White Bear Lake	Washington	A	14.4 ft	2,428 acres	83 ft
21	Halfbreed Lake	Washington	A	5.2 ft	92 acres	34 ft
22	Perch Lake	Polk	A	10.3 ft	84 acres	19 ft
23	Le Homme Dieu Lake	Douglas	A	13.1 ft	1,801 acres	85 ft
24	Big Carnelian Lake	Washington	A	14.5 ft	457 acres	66 ft
25	Geneva Lake	Douglas	A	14.1 ft	640 acres	63 ft
26	South Lindstrom Lake	Chisago	A	5.6 ft	455 acres	34 ft
27	Rachel Lake	Douglas	A	7.9 ft	448 acres	65 ft
28	Andrew Lake	Douglas	A	13.9 ft	923 acres	83 ft
29	Moon Lake	Douglas	A	21 ft	139 acres	38 ft
30	School Lake	Chisago	A	7.9 ft	-	-
31	Spring Lake	Polk	A	5.6 ft	134 acres	35 ft
32	Lottie Lake	Douglas	A	16.1 ft	46 acres	31 ft
33	Blooms Lake	Chisago	A	6.9 ft	48 acres	41 ft
34	Carlos Lake	Douglas	A	18 ft	2,605 acres	163 ft
35	North Lindstrom Lake	Chisago	A	6.9 ft	142 acres	29 ft
36	Brophy Lake	Douglas	A	15.4 ft	297 acres	44 ft
37	Burgen Lake	Douglas	A	12 ft	174 acres	43 ft
38	Kroon Lake	Chisago	A	5.9 ft	193 acres	30 ft
39	South Oscar Lake	Douglas	A	16.7 ft	-	-
40	Stoney Lake	Douglas	A	19 ft	87 acres	58 ft
41	Lily Lake	Washington	A	10.5 ft	44 acres	51 ft
42	Louise Lake	Douglas	A	14.5 ft	214 acres	33 ft
43	Little Carnelian Lake	Washington	A	20 ft	137 acres	68 ft
44	North Union Lake	Douglas	A	20.3 ft	118 acres	42 ft
45	Elmo Lake	Washington	A	11.1 ft	257 acres	140 ft
46	Little Horseshoe Lake	Chisago	A	7.5 ft	49 acres	43 ft
47	Mattson Lake	Chisago	A	3.9 ft	-	-
48	Cable Lake	Polk	A	10.2 ft	194 acres	14 ft
49	Blackwell Lake	Douglas	A	11.5 ft	307 acres	42 ft
50	Chain Lake	Chisago	A	5.9 ft	-	-
51	Jane Lake	Washington	A	13 ft	158 acres	39 ft
52	Olson Lake	Washington	A	11.2 ft	87 acres	15 ft
53	White Rock Lake	Washington	A	7.5 ft	-	-
54	Wood Pile Lake	Washington	A	10 ft	-	-
55	Sunset Lake	Washington	A	9.5 ft	133 acres	17 ft
56	Master Man Lake	Washington	A	4.5 ft	-	-
57	Pine Tree Lake	Washington	A	8.5 ft	-	-
58	East Boot Lake	Washington	A	15 ft	47 acres	27 ft
59	Edith Lake	Washington	A	8.2 ft	81 acres	43 ft
60	Mays Lake	Washington	A	11 ft	40 acres	25 ft
61	West Boot Lake	Washington	A	14 ft	50 acres	34 ft
62	Sunrise Lake	Chisago	A	8.4 ft	796 acres	21 ft
63	Big Cedar Lake-North Site-Near West Bend	Washington	A	11.8 ft	937 acres	105 ft
64	Big Cedar Lake-South Site-Near West Bend	Washington	A	12.6 ft	937 acres	105 ft
65	Big Sand Lake	Burnett	A	11 ft	1,434 acres	55 ft
66	Gaslyn Lake	Burnett	A	4.5 ft	161 acres	12 ft
67	Irene Lake	Douglas	B	9.8 ft	639 acres	44 ft
68	Badger Lake	Polk	B	6.6 ft	256 acres	19 ft
69	Sarah Lake	Polk	B	7.7 ft	366 acres	27 ft
70	Pool	Washington	B	5.9 ft	8,393 acres	78 ft
71	Kittleson Lake	Polk	B	7.1 ft	-	-
72	O'Connors Lake	Washington	B	6.6 ft	-	-
73	Wind Lake	Polk	B	10 ft	39 acres	7 ft
74	Green Lake	Washington	B	9 ft	70 acres	37 ft
75	Lake St Croix	St. Croix	B	5.6 ft	7,696 acres	60 ft
76	Cranberry Lake	Burnett	B	8.8 ft	66 acres	26 ft
77	Balsam Lake	Polk	B	6.6 ft	1,901 acres	37 ft
78	Whitefish Lake	Douglas	B	25 ft	848 acres	102 ft
79	Bass Lake	St. Croix	B	10 ft	-	-
80	Little Friess Lake	Washington	B	7.4 ft	16 acres	34 ft
81	Clear Lake	Polk	B	15.5 ft	30 acres	26 ft
82	Bone Lake	Polk	B	8 ft	1,667 acres	43 ft
83	Long Lake	Burnett	B	21.5 ft	222 acres	41 ft
84	Pike Lake	Washington	B	7 ft	461 acres	45 ft
85	Crescent Lake	Polk	B	4.5 ft	15 acres	43 ft
86	Pipe Lake	Polk	B	11.5 ft	293 acres	68 ft
87	Bark Lake	Washington	B	5.5 ft	65 acres	34 ft
88	Saint Croix Flowage Lake	Douglas	B	10.5 ft	1,913 acres	-
89	Mud Lake	Polk	B	4.3 ft	14 acres	15 ft
90	North Twin Lake	Polk	B	-	129 acres	27 ft
91	Big Lake	Polk	B	9 ft	245 acres	24 ft
92	Deer Lake	Burnett	B	13 ft	153 acres	23 ft
93	Deer Lake	Polk	B	16 ft	786 acres	46 ft
94	Loon Lake	Burnett	B	8.5 ft	191 acres	28 ft
95	Amnicon Lake	Douglas	B	5 ft	390 acres	31 ft
96	Paulsen Lake	Polk	B	12 ft	-	-
97	Ward Lake	Polk	B	6 ft	82 acres	43 ft
98	Druid Lake	Washington	B	5.5 ft	122 acres	53 ft
99	Church Pine Lake	Polk	B	13 ft	87 acres	45 ft
100	Viola Lake	Burnett	B	17 ft	265 acres	34 ft