Crater Lake

Oregon, United States

Depth

1220m

Visibility

15m - 45m

Entry

Boat

Experience Level

Advanced

Crater Lake

Oregon, United States

Depth

1220m

Visibility

15m - 45m

Entry

Boat

Experience Level

Advanced

About Crater Lake

Also known as Old Man Of The Lake. This is the deepest lake in The United States Of America. Reaching 1220 meters down, this is also the lake with the best visibility. It was formed due to the collapse of the volcano Mount Mazama, more then 5677 years ago. Here you will need a permit before you are allowed diving. In about 450 meters of water you will find the wreck of a helicopter that crashed here several years ago. Its a beautiful dive, but due to circumstances, its recommended for advanced and most technical divers ONLY.

Crater Lake Dive Info

Terrain & Features

Deep, Other, Inland

Entry Type

Boat

Max Depth

1220m

Visibility Range

15m – 45m

Experience Level

Advanced

Best Gas Mix

—

CNS Load (20 min)

-1% at 1218m / 21%

O₂

Multi-Level Dive Planner

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Marine Life

None

Weather Conditions

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Dive Operators near Crater Lake

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Location

Location details missing.

Dive Site Hazards

Gradual Narcosis Onset — Narcosis may develop slowly, making self-assessment unreliable.
Task Fixation at Depth — Cognitive narrowing at depth can reduce awareness of time and ascent rate.
Increased Gas Density Breathing Load — Higher gas density at depth increases work of breathing.

Thermocline Buoyancy Shift — Sharp thermoclines can cause sudden buoyancy changes.

Instant Visibility Collapse — Sediment disturbance can eliminate visibility immediately.

Late Detection of Structures — Submerged structures may only appear at very close range.

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