Three Deepest Lakes in the United States
America's Deepest Lakes: Crater, Tahoe, Chelan
The three deepest lakes in the U.S. are all western, volcanic/glacial origin:
| Rank | Lake | State(s) | Max Depth | Origin |
|---|
| 1 | Crater Lake | Oregon | 1,943 ft (592 m) | Caldera (Mazama eruption ~7,700 yr ago) |
| 2 | Lake Tahoe | CA/NV | 1,645 ft (501 m) | Fault-block basin (glacial sculpting) |
| 3 | Lake Chelan | Washington | 1,486 ft (453 m) | Glacial trough (Chelan Mountains) |
Crater Lake (OR)
- No inlets/outlets—fed by snow/rain; exceptional clarity (Secchi 30+ m).
- Deepest in US, 9th globally.
- Wizard Island (cinder cone), Phantom Ship (resistant dike).
- National Park since 1902.
Lake Tahoe (CA/NV)
- Largest alpine lake in NA; 2nd deepest.
- Clarity declining (urban runoff, invasive shrimp); restoration efforts underway.
- Year-round recreation: ski, sail, hike, casino (NV side).
Lake Chelan (WA)
- 50.5 mi long, fjord-like; 3rd deepest.
- Hydroelectric (Lake Chelan Dam); gateway to North Cascades NP (Stehekin).
- No road to head—ferry or plane only.
Honorable Mentions (Depth)
- Lake Superior – 1,333 ft (but 31,700 mi² area).
- Lake Pend Oreille (ID) – 1,150 ft.
- Lake Crescent (WA) – 624 ft.
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