100 Foot Hole

Hawaii, United States

Depth

27m

Visibility

13m - 38m

Entry

Boat

Experience Level

Experienced

100 Foot Hole

Hawaii, United States

Depth

27m

Visibility

13m - 38m

Entry

Boat

Experience Level

Experienced

About 100 Foot Hole

100 Foot Hole used to be an ancient Hawaiian fishing spot that was only used by the Ali'I (royalty). Although the site is only 90 feet deep, it was named as such due to the fisherman answering that the site is about 100 feet deep. The site is built of groups of volcanic rocks that together have formed caves, ledges and a large open-ended caver. The main tunnel can be found in a formation encrusted with cauliflower coral. Within the main tunnel there is a huge rock that one can traverse. One should bring a dive light to view the vast amounts of marine life that live in the cave.

100 Foot Hole Dive Info

Terrain & Features

Rock, Other

Entry Type

Boat

Max Depth

27m

Visibility Range

13m – 38m

Experience Level

Experienced

Best Gas Mix

21% – 38%

O₂

CNS Load (25 min)

13% at 25m / 36%

O₂

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Marine Life

Amberjacks
Crabs
Lobster
Manta Rays
Moray Eels
Nocturnal Fish
Octopus
Tuna
Turtles
White Tip Reef Sharks

Weather Conditions

Water Temperature ℃

Dive Operators near 100 Foot Hole

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Location

Dive Site Hazards

Bubble Trapping Under Overhangs — Rock overhangs can trap exhaled bubbles, reducing visibility and causing disorientation.
Reflected Surge Patterns — Surge reflecting off rock faces can create irregular and unpredictable water movement.
Current Funnel Effect — Narrow gaps between rocks can accelerate water flow unexpectedly.

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