Lakes / Montana / Fish Species / Smallmouth Bass

Montana Lakes With Smallmouth Bass

51 counted Montana lakes list Smallmouth Bass in Montana Fish, Wildlife & Parks records. The largest is Fort Peck Lake at 233,053 acres.

#	Lake	County	Surface Area	Max Depth
1	Fort Peck Lake	Valley	233,053 acres	-
2	Flathead Lake	Lake	122,132 acres	About 380 ft
3	Canyon Ferry Lake	Broadwater	32,773 acres	About 170 ft
4	Lake Koocanusa	Lincoln	28,723 acres	-
5	Bighorn Lake	Big Horn	12,422.5 acres	About 440 ft
6	Noxon Reservoir	Sanders	7,592 acres	-
7	Nelson Reservoir	Phillips	4,115 acres	-
8	Fresno Reservoir	Hill	3,185 acres	-
9	Little Bitterroot Lake	Flathead	2,970 acres	About 260 ft
10	Cabinet Gorge Reservoir	Sanders	2,848 acres	-
11	Tongue River Reservoir	Big Horn	2,112 acres	-
12	McGregor Lake	Flathead	1,522 acres	About 220 ft
13	Lake Mary Ronan	Lake	1,513 acres	About 40 ft
14	Bull Lake	Lincoln	1,162 acres	About 60 ft
15	Thompson Falls Reservoir	Sanders	969 acres	-
16	Echo Lake	Flathead	695 acres	About 70 ft
17	Dickey Lake	Lincoln	585 acres	About 70 ft
18	Middle Thompson Lake	Lincoln	557 acres	About 160 ft
19	Hubbart Reservoir	Flathead	480 acres	About 60 ft
20	Glen Lake	Lincoln	301 acres	About 30 ft
21	Upper Thompson Lake	Lincoln	294 acres	About 100 ft
22	Lower Crow Reservoir	Lake	286 acres	-
23	Loon Lake	Lincoln	222 acres	About 114 ft
24	Sophie Lake	Lincoln	221 acres	About 50 ft
25	Fennon Slough	Flathead	215 acres	-
26	Lower Thompson Lake	Lincoln	202 acres	About 140 ft
27	Church Slough	Flathead	195 acres	-
28	Castle Rock Lake	Rosebud	155 acres	About 40 ft
29	Lake Five	Flathead	152 acres	About 60 ft
30	Ester Lake	Phillips	139 acres	-
31	Horseshoe Lake	Lincoln	138 acres	About 130 ft
32	South Sandstone Reservoir	Fallon	114 acres	About 20 ft
33	Marl Lake	Lincoln	109 acres	-
34	Peterson Lake	Flathead	97 acres	-
35	Tetrault Lake	Lincoln	96 acres	About 50 ft
36	Fort Peck Trout Pond	Valley	53 acres	-
37	Bearpaw Lake	Hill	48 acres	-
38	Loon Lake	Lake	45 acres	About 52 ft
39	Krieder Reservoir	Garfield	45 acres	-
40	Gartside Reservoir	Richland	44 acres	About 18 ft
41	Abbot Lake	Flathead	41 acres	About 26 ft
42	Horseshoe Lake	Lake	41 acres	About 25 ft
43	Arapooish Pond	Big Horn	29 acres	-
44	Spotted Eagle Lake	Custer	25 acres	About 10 ft
45	Silvertip Reservoir	Prairie	19 acres	-
46	Rednose Reservoir	Big Horn	12 acres	-
47	Little Loon Lake	Lincoln	9 acres	About 35 ft
48	Burnside Reservoir	Powder River	2 acres	-
49	Gaskill Reservoir	Powder River	2 acres	-
50	Red Rock Reservoir Number One	Rosebud	2 acres	-
51	Poker Jim Reservoir	Rosebud	1 acres	-

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