Rising about 500 ft. from the submerged flank of Haleakala to a summit only 162 ft. above sea level.
Molokini lies along Haleakala's southwest rift zone. Much of the rift zone is mantled with lava, cinders, and ash erupted during the past 50,000 years. For that reason, geologists have always assumed that Molokini was a fairly young volcanic formation. But the 230,000-year age suggests that Molokini is much older, probably older than Haleakala Crater itself.
Getting to Molokini can be half the fun!
The Back Side of Molokini si famous with Scuba Divers. There are bullets and other bomb parts scattered around and on the 'Island' left over from when the they bombed Kahoolawe and Molokini for 50+ years. In the Photo below see Dave of Mahana Nai'a likes to free dive down looking for Bullets, here he found 2.
The isolation of Molokini Crater creates a unique Maui snorkeling experience. There are significant reasons why Molokini snorkeling is so special. The quality of the water surrounding Molokini is superior, providing unsurpassed clarity. Visibility is consistently excellent, often in excess of 150 feet.
Molokini is rock, with no soil to wash down into the water. Absent of sediment, the water is amazingly clear allowing excellent sunlight penetration. This enhanced sunlight feeds the algae living inside the coral. Offshore currents bring food, while flushing away what little sediment exists. The result is a uniquely healthy coral reef providing unsurpassed Maui snorkeling. Located in the middle of Molokini this reef is protected from waves and surge.
Inside the sheltered arms of the crater, Molokini's shallow reef is teeming with a wide variety of colorful and fascinating fish and marine animals. You will experience a rare opportunity to closely observe the marine life at Molokini Crater.