What is the deepest lake in Wyoming?

Of the lakes with a published depth, Fremont Lake is the deepest at about 690 ft.

Deepest lakes in Wyoming: 10 lakes ranked by depth

The deepest lakes in Wyoming with a published depth, deepest first. Deep lakes stay cold below the surface all summer, which is what trout and big predators want.

Deepest first

#	Lake	Deepest	Size
1	Fremont Lake	about 690 ft	5,050 acres
2	Bighorn Lake	about 450 ft	17,300 acres
3	Jackson Lake	about 438 ft	25,500 acres
4	Flaming Gorge Reservoir	about 436 ft	42,000 acres
5	Yellowstone Lake	about 394 ft	87,000 acres
6	Jenny Lake	about 256 ft	1,190 acres
7	Leigh Lake	about 250 ft	1,790 acres
8	Seminoe Reservoir	about 206 ft	20,300 acres
9	Shoshone Lake	about 205 ft	8,050 acres
10	Pathfinder Reservoir	about 192 ft	22,000 acres

1. Fremont Lake

Fremont Lake spreads over 5,050 acres. It lies near Pinedale. Like most lakes its size in Wyoming, it should hold trout and yellow perch. The deepest water is around 690 ft. Its bed shows three point drop-offs and a sheltered cove worth a first look.

Fremont Lake today: water temperature, bite times and the 3-D lake bed

2. Bighorn Lake

At 17,300 acres, Bighorn Lake is a big lake. It lies near Lovell. It is the Bighorn River behind Yellowtail Dam. The fish here are walleye, trout, yellow perch and catfish. At about 450 ft deep, it stays cooler below the surface well into summer. On the 3-D map the bed has three point drop-offs and a sheltered cove: good places to start. Bighorn Lake straddles the Wyoming-Montana border within Bighorn Canyon National Recreation Area, impounded by Yellowtail Dam.

Bighorn Lake today: water temperature, bite times and the 3-D lake bed

3. Jackson Lake

Jackson Lake covers some 25,500 acres. You will find it about 69 miles southwest of Idaho Falls. Jackson Lake Dam holds it on the Snake River. Expect trout. It goes down to about 438 ft. Jackson Lake is a natural glacial lake in Grand Teton National Park that was enlarged by Jackson Lake Dam.

Jackson Lake today: water temperature, bite times and the 3-D lake bed

4. Flaming Gorge Reservoir

Flaming Gorge Reservoir spreads over some 42,000 acres. The fish here are lake trout, trout, kokanee salmon and smallmouth bass. It goes down to about 436 ft.

Flaming Gorge Reservoir today: water temperature, bite times and the 3-D lake bed

5. Yellowstone Lake

Yellowstone Lake spreads over some 87,000 acres. It lies about 30 miles northwest of West Yellowstone. Expect trout and lake trout. At about 394 ft deep, it stays cooler below the surface well into summer. The lake bed gives you three point drop-offs and two sheltered coves to work. At 7,732 feet elevation, Yellowstone Lake is the largest freshwater lake above 7,000 feet in North America.

Yellowstone Lake today: water temperature, bite times and the 3-D lake bed

6. Jenny Lake

Jenny Lake covers 1,190 acres. It lies within an easy drive of Idaho Falls (about 68 miles). Like most lakes its size in Wyoming, it should hold trout and yellow perch. At about 256 ft deep, it stays cooler below the surface well into summer. Its bed shows three point drop-offs and a sheltered cove worth a first look. Jenny Lake, at the foot of the Tetons, is considered one of the most pristine, unpolluted lakes in Grand Teton National Park. It is a clear lake, so long casts and a quiet approach pay off.

Jenny Lake today: water temperature, bite times and the 3-D lake bed

7. Leigh Lake

Leigh Lake covers some 1,790 acres. It lies about 68 miles west of Idaho Falls. The usual Wyoming mix applies: trout and yellow perch. It goes down to about 250 ft. On the 3-D map the bed has three point drop-offs and a sheltered cove: good places to start. Leigh Lake is a glacial lake in Grand Teton National Park just north of Jenny Lake.

Leigh Lake today: water temperature, bite times and the 3-D lake bed

8. Seminoe Reservoir

Seminoe Reservoir is a reservoir of 20,300 acres. The lake is about 57 miles northeast of Casper. It is the North Platte River behind Seminoe Dam. Like most lakes its size in Wyoming, it should hold trout, lake trout, yellow perch and smallmouth bass. At about 206 ft deep, it stays cooler below the surface well into summer. Its bed shows three point drop-offs and two sheltered coves worth a first look.

Seminoe Reservoir today: water temperature, bite times and the 3-D lake bed

9. Shoshone Lake

Shoshone Lake covers 8,050 acres of water. It lies near West Yellowstone. Lake trout and trout are the draw. At about 205 ft deep, it stays cooler below the surface well into summer. Shoshone Lake is the largest backcountry lake in the lower 48 states that cannot be reached by road.

Shoshone Lake today: water temperature, bite times and the 3-D lake bed

10. Pathfinder Reservoir

Pathfinder Reservoir covers 22,000 acres. You will find it about 35 miles south of Rawlins. It is the North Platte River behind Pathfinder Dam. The fish here are walleye, trout, kokanee salmon and yellow perch. The deepest water is around 192 ft. Pathfinder Reservoir on the North Platte River holds the only established U.S. population of the Ohrid trout, a species native to the Balkans.

Pathfinder Reservoir today: water temperature, bite times and the 3-D lake bed

The clearest of them

Jenny Lake is known for clear water. On a clear lake fish see a long way: lighter line, natural colours and longer casts make the difference.

Fishing deep water

Deep lakes reward slow, vertical fishing: drop a jig or a spoon to the depth where fish show on the sonar and work it right there. In spring and fall the fish come shallow and any method works.