Montana Lakes With Longnose Dace

18 counted Montana lakes list Longnose Dace 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	Canyon Ferry Lake	Broadwater	32,773 acres	About 170 ft
3	Lake Koocanusa	Lincoln	28,723 acres	-
4	Lake Elwell	Liberty	14,842 acres	About 150 ft
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	Ennis Lake	Madison	3,692 acres	-
9	Cabinet Gorge Reservoir	Sanders	2,848 acres	-
10	Freezeout Lake	Teton	2,596 acres	-
11	Tongue River Reservoir	Big Horn	2,112 acres	-
12	Deadmans Basin Reservoir	Wheatland	1,954 acres	-
13	Thompson Falls Reservoir	Sanders	969 acres	-
14	Petrolia Lake	Petroleum	518 acres	-
15	Silver Lake	Deer Lodge	300 acres	-
16	Bailey Reservoir	Hill	85 acres	About 30 ft
17	Lake Elmo	Yellowstone	62 acres	About 16 ft
18	Morrison Lake	Beaverhead	23 acres	About 50 ft

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