Name	Location	Depth
1.	Baikal	Siberia, Russia	5,369 ft (1,637 m)
2.	Tanganyika	Africa (Tanzania, Zaire & Zambia)	4,708 ft (1,435 m)
3.	Caspian Sea	Iran and Russia	3,104 ft (946 m)
4.	Nyasa	Africa (Mozambique, Tanzania & Malawi)	2,316 ft (706 m)
5.	Issyk Kul	Kyrgizstan, Central Asia	2,297 ft (700 m)
6.	Great Slave	Northwest Territories, Canada	2,015 ft (614 m)
7.	Crater Lake	Oregon, U.S.A.	1,943 ft (592 m)
8.	Lake Tahoe	California & Nevada, U.S.A.	1,685 ft (514 m)
9.	Lake Chelan	Washington, U.S.A.	1,419 ft (433 m)
10.	Great Bear	Northwest Territories, Canda	1,356 ft (413 m)
11.	Lake Superior	Canada & U.S.A.	1,333 ft (406 m)
12.	Titicaca	Peru	1,214 ft (370 m)
13.	Pend Oreille	Idaho, U.S.A.	1,150 ft (351 m)

At 1,943 feet (592 meters), Crater Lake is the deepest lake in the United States and the seventh deepest in the world.

Crater Lake was first explored thoroughly in 1886 by a party from the U.S. Geological Survey who set out to determine the depth of the lake. Their primitive sounding device consisted of a lead pipe attached to piano wire. After lowering it into the water at 168 locations around the lake, they concluded the deepest part of the lake to be 1,996 feet (608 meters). This was only 52 feet (16 meters), or less than 3%, off from the official depth measurement recorded with multibeam sidescan sonar in 2000.

Rev. 9/2001 klb