Lakes / Montana / Fish Species / Westslope Cutthroat Trout

Montana Lakes With Westslope Cutthroat Trout

448 counted Montana lakes list Westslope Cutthroat Trout in Montana Fish, Wildlife & Parks records. The largest is Flathead Lake at 122,132 acres.

#	Lake	County	Surface Area	Max Depth
1	Flathead Lake	Lake	122,132 acres	About 380 ft
2	Lake Koocanusa	Lincoln	28,723 acres	-
3	Hungry Horse Reservoir	Flathead	23,577 acres	-
4	Hebgen Lake	Gallatin	12,564 acres	About 80 ft
5	Noxon Reservoir	Sanders	7,592 acres	-
6	Lake McDonald	Flathead	6,867 acres	-
7	Saint Mary Lake	Glacier	3,933 acres	-
8	Holter Lake	Lewis and Clark	3,667 acres	-
9	Whitefish Lake	Flathead	3,315 acres	About 220 ft
10	Swan Lake	Lake	3,269 acres	About 120 ft
11	Hauser Lake	Lewis and Clark	3,200 acres	About 65 ft
12	Ashley Lake	Flathead	2,850 acres	About 200 ft
13	Cabinet Gorge Reservoir	Sanders	2,848 acres	-
14	Georgetown Lake	Granite	2,818 acres	About 25 ft
15	Lower Saint Mary Lake	Glacier	2,177 acres	-
16	Lake Helena	Lewis and Clark	2,073 acres	About 12 ft
17	Bowman Lake	Flathead	1,722 acres	-
18	Kintla Lake	Flathead	1,665 acres	-
19	Lake Mary Ronan	Lake	1,513 acres	About 40 ft
20	Gibson Reservoir	Lewis and Clark	1,289 acres	About 165 ft
21	Placid Lake	Missoula	1,212 acres	About 93 ft
22	Tally Lake	Flathead	1,211 acres	About 450 ft
23	Bull Lake	Lincoln	1,162 acres	About 60 ft
24	Seeley Lake	Missoula	1,031 acres	About 120 ft
25	Big Salmon Lake	Flathead	972 acres	-
26	Thompson Falls Reservoir	Sanders	969 acres	-
27	Martinsdale Reservoir	Meagher	947 acres	-
28	Ruby River Reservoir	Madison	941 acres	-
29	Lake Como	Ravalli	911 acres	-
30	Quartz Lake	Flathead	869 acres	-
31	Lindbergh Lake	Missoula	815 acres	About 120 ft
32	Willow Creek Reservoir	Madison	713 acres	-
33	Salmon Lake	Missoula	631 acres	About 65 ft
34	Whitetail Reservoir	Jefferson	603 acres	-
35	Upper Stillwater Lake	Flathead	592 acres	-
36	Middle Thompson Lake	Lincoln	557 acres	About 160 ft
37	Holland Lake	Missoula	414 acres	About 140 ft
38	Harrison Lake	Flathead	391 acres	-
39	Spar Lake	Lincoln	383 acres	About 200 ft
40	Lake Blaine	Flathead	382 acres	-
41	East Fork Reservoir	Granite	372 acres	-
42	Nevada Lake	Powell	337 acres	About 65 ft
43	Glen Lake	Lincoln	301 acres	About 30 ft
44	Silver Lake	Deer Lodge	300 acres	-
45	Lake Alva	Missoula	298 acres	About 90 ft
46	Upper Thompson Lake	Lincoln	294 acres	About 100 ft
47	Lake Inez	Missoula	288 acres	About 72 ft
48	Elk Lake	Beaverhead	283 acres	About 62 ft
49	Delmoe Lake	Jefferson	279 acres	-
50	Mission Reservoir	Lake	275 acres	About 70 ft
51	Saint Marys Lake	Lake	273 acres	About 240 ft
52	Lower Stillwater Lake	Flathead	250 acres	About 50 ft
53	Goose Lake	Glacier	242 acres	-
54	Lake Rogers	Flathead	239 acres	About 15 ft
55	Sophie Lake	Lincoln	221 acres	About 50 ft
56	Bair Reservoir	Meagher	221 acres	-
57	Trout Lake	Flathead	216 acres	-
58	Lower Thompson Lake	Lincoln	202 acres	About 140 ft
59	Coopers Lake	Powell	200 acres	About 70 ft
60	Crystal Lake	Missoula	187 acres	-
61	Rock Creek Lake	Powell	178 acres	-
62	Lower Quartz Lake	Flathead	167 acres	-
63	Lower Willow Creek Reservoir	Granite	165 acres	-
64	Lake Five	Flathead	152 acres	About 60 ft
65	Sunburst Lake	Flathead	148 acres	About 200 ft
66	Flotilla Lake	Flathead	147 acres	-
67	Fred Burr Lake	Granite	143 acres	-
68	Cyclone Lake	Flathead	140 acres	-
69	Elk Lake	Missoula	117 acres	-
70	George Lake	Missoula	114 acres	-
71	Wanless Lake	Sanders	111 acres	-
72	Tin Cup Lake	Ravalli	111 acres	-
73	Boulder Lake	Missoula	109 acres	About 90 ft
74	Marl Lake	Lincoln	109 acres	-
75	Bull Lake	Lincoln	107 acres	-
76	Glacier Lake	Missoula	106 acres	-
77	Clearwater Lake	Missoula	104 acres	About 42 ft
78	Echo Lake	Granite	102 acres	About 25 ft
79	Tetrault Lake	Lincoln	96 acres	About 50 ft
80	Bass Lake	Ravalli	93 acres	-
81	Rogers Lake	Flathead	85 acres	-
82	Twin Lakes	Beaverhead	85 acres	About 46 ft
83	Rainy Lake	Missoula	82 acres	About 29 ft
84	Grace Lake	Flathead	82 acres	-
85	Koessler Lake	Missoula	81 acres	-
86	Upper Whitefish Lake	Flathead	80 acres	About 25 ft
87	Lake Marshall	Missoula	80 acres	About 56 ft
88	Stanton Lake	Flathead	79 acres	-
89	Lena Lake	Missoula	74 acres	About 75 ft
90	Storm Lake	Deer Lodge	74 acres	-
91	Margaret Lake	Glacier	72 acres	-
92	Lake Evangeline	Flathead	72 acres	About 140 ft
93	Savage Lake	Lincoln	71 acres	About 65 ft
94	Elbow Lake	Missoula	71 acres	-
95	Marion Lake	Flathead	69 acres	About 150 ft
96	Lower Miner Lakes	Beaverhead	67 acres	About 33 ft
97	Woodward Lake	Missoula	65 acres	About 110 ft
98	Black Lake	Lake	61 acres	-
99	Lake of the Woods	Flathead	61 acres	-
100	Moose Lake	Flathead	60 acres	-

Showing the 100 largest of 448 counted lakes with Westslope Cutthroat Trout.

Source: Montana Fish, Wildlife & Parks lake data. Verified October 30, 2026.