Lakes / Montana / Madison County

Lakes in Madison County, Montana

66 lakes counted in Madison County - the largest is Ennis Lake at 3,692 acres.

Lakes Counted

3,692 acres

Largest - Ennis Lake

Madison County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.

All Counted Lakes

#	Lake	County	Surface Area	Max Depth
1	Ennis Lake	Madison	3,692 acres	-
2	Ruby River Reservoir	Madison	941 acres	-
3	Willow Creek Reservoir	Madison	713 acres	-
4	Earthquake Lake	Madison	612 acres	About 120 ft
5	Cliff Lake	Madison	608 acres	-
6	Wade Lake	Madison	202 acres	-
7	Hidden Lake	Madison	147 acres	About 72 ft
8	South Meadow Creek Lake	Madison	71 acres	-
9	Cedar Lake	Madison	36 acres	-
10	Cataract Lake	Madison	35.3 acres	-
11	Bell Lake	Madison	24 acres	-
12	Dutchman Lake	Madison	23 acres	-
13	Sheep Lake	Madison	20 acres	-
14	Noble Lake	Madison	18 acres	About 55 ft
15	Diamond Lake	Madison	17 acres	-
16	Blue Danube Lake	Madison	15 acres	-
17	Axolotl Lake	Madison	14 acres	-
18	Cliff Lake	Madison	14 acres	-
19	Echo Lake	Madison	14 acres	-
20	Louise Lake	Madison	13 acres	-
21	Sailor Lake	Madison	13 acres	-
22	No Man Lake	Madison	13 acres	-
23	Twin Lakes	Madison	12 acres	-
24	Spanish Lakes	Madison	12 acres	-
25	Lower Branham Lake	Madison	12 acres	About 21 ft
26	Sureshot Lake	Madison	11 acres	-
27	Twin Lakes	Madison	11 acres	-
28	Deep Lake	Madison	11 acres	-
29	Avalanche Lake	Madison	10 acres	-
30	Crystal Lake	Madison	9 acres	-
31	Ramona Lake	Madison	9 acres	-
32	Beehive Lake	Madison	9 acres	-
33	Lower Boulder Lake	Madison	8 acres	-
34	Blue Paradise Lake	Madison	8 acres	-
35	Lake Cameron	Madison	8 acres	-
36	Reservoir Lake	Madison	8 acres	-
37	Upper Boulder Lake	Madison	8 acres	-
38	Gnome Lake	Madison	7 acres	-
39	Ulerys Lakes	Madison	7 acres	-
40	McKelvey Lake	Madison	6 acres	-
41	Lost Cabin Lake	Madison	6 acres	-
42	Lake Ha Hand	Madison	6 acres	-
43	Cherry Lake	Madison	6 acres	-
44	Chilled Lakes	Madison	6 acres	-
45	Skytop Lake	Madison	5 acres	-
46	Sunrise Lake	Madison	5 acres	About 30 ft
47	Blue Lake	Madison	5 acres	-
48	Painted Lake	Madison	5 acres	-
49	Gneiss Lake	Madison	4 acres	-
50	Jackson Lake	Madison	4 acres	About 30 ft
51	Sunset Lake	Madison	4 acres	-
52	Upper Mason Lake	Madison	4 acres	-
53	Goose Lake	Madison	4 acres	-
54	Blossom Lake	Madison	3 acres	About 4 ft
55	Finger Lake	Madison	3 acres	-
56	Hilgard Lake	Madison	3 acres	-
57	Shadow Lake	Madison	3 acres	-
58	Brannan Lakes	Madison	2 acres	-
59	Crag Lake	Madison	2 acres	-
60	Expedition Lake	Madison	2 acres	-
61	Oval Lake	Madison	2 acres	About 8 ft
62	Margo Lake	Madison	2 acres	-
63	Twin Lakes	Madison	2 acres	About 15 ft
64	Otter Lake	Madison	2 acres	-
65	High Hope Lake	Madison	2 acres	-
66	Camp Creek Reservoir	Madison	1 acres	-

Sources: Montana Fish, Wildlife & Parks lake data; USGS. Verified October 30, 2026.