What lakes are in the St. Croix Watershed?

892 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 has the most favourable nutrient and algae readings in the St. Croix Watershed, with about 13 ft of clarity.

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 26, 2026

Counties in this watershed

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

Monitored Lakes (892)

#	Lake	County	Clarity	Area	Depth
1	Lobster Lake	Douglas	13 ft	1,334 acres	65 ft
2	Latoka Lake	Douglas	19 ft	767 acres	108 ft
3	Maple Lake	Douglas	14.1 ft	831 acres	78 ft
4	Chippewa Lake	Douglas	14.8 ft	1,186 acres	95 ft
5	Twin Lake	Washington	13 ft	-	-
6	Cowdry Lake	Douglas	17.1 ft	243 acres	52 ft
7	Clear Lake	Washington	14 ft	42 acres	27 ft
8	Vermont Lake	Douglas	14.1 ft	342 acres	59 ft
9	Darling Lake	Douglas	14 ft	1,050 acres	62 ft
10	Ida Lake	Douglas	16.4 ft	4,445 acres	106 ft
11	Fish Lake	Chisago	9.4 ft	319 acres	57 ft
12	Union Lake	Polk	15 ft	-	-
13	Square Lake	Washington	17 ft	203 acres	68 ft
14	Crooked Lake	Douglas	14 ft	284 acres	35 ft
15	Spider Lake	Chisago	6.5 ft	131 acres	9 ft
16	Miltona Lake	Douglas	18.7 ft	5,731 acres	105 ft
17	Big Marine Lake	Washington	12 ft	-	-
18	Mary Lake	Douglas	10.5 ft	2,450 acres	40 ft
19	Poplar Lake	Polk	8.9 ft	90 acres	23 ft
20	White Bear Lake	Washington	14.4 ft	2,428 acres	83 ft
21	Halfbreed Lake	Washington	5.2 ft	92 acres	34 ft
22	Perch Lake	Polk	10.3 ft	84 acres	19 ft
23	Le Homme Dieu Lake	Douglas	13.1 ft	1,801 acres	85 ft
24	Big Carnelian Lake	Washington	14.5 ft	457 acres	66 ft
25	Geneva Lake	Douglas	14.1 ft	640 acres	63 ft
26	South Lindstrom Lake	Chisago	5.6 ft	455 acres	34 ft
27	Rachel Lake	Douglas	7.9 ft	448 acres	65 ft
28	Andrew Lake	Douglas	13.9 ft	923 acres	83 ft
29	Moon Lake	Douglas	21 ft	139 acres	38 ft
30	School Lake	Chisago	7.9 ft	-	-
31	Spring Lake	Polk	5.6 ft	134 acres	35 ft
32	Lottie Lake	Douglas	16.1 ft	46 acres	31 ft
33	Blooms Lake	Chisago	6.9 ft	48 acres	41 ft
34	Carlos Lake	Douglas	18 ft	2,605 acres	163 ft
35	North Lindstrom Lake	Chisago	6.9 ft	142 acres	29 ft
36	Brophy Lake	Douglas	15.4 ft	297 acres	44 ft
37	Burgen Lake	Douglas	12 ft	174 acres	43 ft
38	Kroon Lake	Chisago	5.9 ft	193 acres	30 ft
39	South Oscar Lake	Douglas	16.7 ft	-	-
40	Stoney Lake	Douglas	19 ft	87 acres	58 ft
41	Lily Lake	Washington	10.5 ft	44 acres	51 ft
42	Louise Lake	Douglas	14.5 ft	214 acres	33 ft
43	Little Carnelian Lake	Washington	20 ft	137 acres	68 ft
44	North Union Lake	Douglas	20.3 ft	118 acres	42 ft
45	Elmo Lake	Washington	11.1 ft	257 acres	140 ft
46	Little Horseshoe Lake	Chisago	7.5 ft	49 acres	43 ft
47	Mattson Lake	Chisago	3.9 ft	-	-
48	Cable Lake	Polk	10.2 ft	194 acres	14 ft
49	Blackwell Lake	Douglas	11.5 ft	307 acres	42 ft
50	Chain Lake	Chisago	5.9 ft	-	-
51	Jane Lake	Washington	13 ft	158 acres	39 ft
52	Olson Lake	Washington	11.2 ft	87 acres	15 ft
53	White Rock Lake	Washington	7.5 ft	-	-
54	Wood Pile Lake	Washington	10 ft	-	-
55	Sunset Lake	Washington	9.5 ft	133 acres	17 ft
56	Master Man Lake	Washington	4.5 ft	-	-
57	Pine Tree Lake	Washington	8.5 ft	-	-
58	East Boot Lake	Washington	15 ft	47 acres	27 ft
59	Edith Lake	Washington	8.2 ft	81 acres	43 ft
60	Mays Lake	Washington	11 ft	40 acres	25 ft
61	West Boot Lake	Washington	14 ft	50 acres	34 ft
62	Sunrise Lake	Chisago	8.4 ft	796 acres	21 ft
63	Big Cedar Lake-North Site-Near West Bend	Washington	11.8 ft	937 acres	105 ft
64	Big Sand Lake	Burnett	11 ft	1,434 acres	55 ft
65	Gaslyn Lake	Burnett	4.5 ft	161 acres	12 ft
66	Irene Lake	Douglas	9.8 ft	639 acres	44 ft
67	Badger Lake	Polk	6.6 ft	256 acres	19 ft
68	Sarah Lake	Polk	7.7 ft	366 acres	27 ft
69	Pool	Washington	5.9 ft	8,393 acres	78 ft
70	Kittleson Lake	Polk	7.1 ft	-	-
71	O'Connors Lake	Washington	6.6 ft	-	-
72	Wind Lake	Polk	10 ft	39 acres	7 ft
73	Green Lake	Washington	9 ft	70 acres	37 ft
74	Lake St Croix	St. Croix	5.6 ft	7,696 acres	60 ft
75	Cranberry Lake	Burnett	8.8 ft	66 acres	26 ft
76	Whitefish Lake	Douglas	25 ft	848 acres	102 ft
77	Bass Lake	St. Croix	10 ft	-	-
78	Little Friess Lake	Washington	7.4 ft	16 acres	34 ft
79	Clear Lake	Polk	15.5 ft	30 acres	26 ft
80	Bone Lake	Polk	8 ft	1,667 acres	43 ft
81	Long Lake	Burnett	21.5 ft	222 acres	41 ft
82	Pike Lake	Washington	7 ft	461 acres	45 ft
83	Crescent Lake	Polk	4.5 ft	15 acres	43 ft
84	Pipe Lake	Polk	11.5 ft	293 acres	68 ft
85	Bark Lake	Washington	5.5 ft	65 acres	34 ft
86	Saint Croix Flowage Lake	Douglas	10.5 ft	1,913 acres	-
87	Mud Lake	Polk	4.3 ft	14 acres	15 ft
88	North Twin Lake	Polk	-	129 acres	27 ft
89	Big Lake	Polk	9 ft	245 acres	24 ft
90	Deer Lake	Burnett	13 ft	153 acres	23 ft
91	Deer Lake	Polk	16 ft	786 acres	46 ft
92	Loon Lake	Burnett	8.5 ft	191 acres	28 ft
93	Amnicon Lake	Douglas	5 ft	390 acres	31 ft
94	Paulsen Lake	Polk	12 ft	-	-
95	Ward Lake	Polk	6 ft	82 acres	43 ft
96	Druid Lake	Washington	5.5 ft	122 acres	53 ft
97	Church Pine Lake	Polk	13 ft	87 acres	45 ft
98	Viola Lake	Burnett	17 ft	265 acres	34 ft
99	Mud Hen Lake	Burnett	11 ft	569 acres	66 ft
100	Half Moon Lake	Polk	15.3 ft	550 acres	60 ft