Big Geiger Cove, located off the coast of Two Harbors, offers a diverse underwater environment featuring reef, kelp forest, and seagrass beds. The site ranges in depth from 4 to 30 metres, with an average depth of 10 metres. Access is strictly by boat, and divers should be prepared for mild currents and potential surge. Visibility typically spans 10 to 25 metres, though conditions vary with swell. Water temperatures range from 14 to 18 degrees Celsius, necessitating appropriate thermal protection. Due to active boat traffic in the area, divers must deploy a surface marker buoy at all times and monitor local conditions before descent.

Eel Cove, located off the coast of Two Harbors, features a combination of reef topography and kelp forest. Divers can explore depths ranging from 9 to 30 metres, with an average depth of 10 metres. The site is accessible only by boat and is suited for intermediate divers. Visibility typically ranges between 10 and 20 metres, allowing for navigation through the kelp columns. Currents are generally mild. Water temperatures remain cool throughout the year, fluctuating between 15 and 18 degrees Celsius, necessitating appropriate thermal protection such as a 5mm wetsuit or semi-dry suit for the typical 45-minute dive duration.

Little Geiger is a reef and kelp forest site located near Two Harbors on Santa Catalina Island. The site features an average depth of 10 metres and is suitable for beginner divers. Access is exclusively by boat. Divers can expect mild currents and visibility ranging from 9 to 30 metres. Water temperatures fluctuate between 15C and 20C throughout the year. Typical dives at this location last approximately 45 minutes. Please be aware of sharp coral present in the area.

Eagle Reef, located 550 metres from the shore of Two Harbors, is a marine site featuring a combination of reef and kelp forest topography. Divers typically encounter moderate currents at this location, which requires boat access. Depths range from 3 to 30 metres, with an average depth of 15 metres. Visibility varies significantly, ranging between 5 and 25 metres. Water temperatures fluctuate between 15C and 18C throughout the year. Due to the presence of moderate currents and potential boat traffic, this site is best suited for intermediate divers. Typical dives at this location last approximately 40 minutes.

West End Eagle Reef is a reef and pinnacle site located 600 metres offshore from Two Harbors. The site features a depth range of 3 to 37 metres, with an average depth of 15 metres. Due to moderate currents and boat traffic, this site is suited for intermediate divers. Boat access is required, and divers should deploy a surface marker buoy upon ascent. Visibility varies between 5 and 25 metres, and water temperatures range from 14 to 17 degrees Celsius, necessitating a 7mm wetsuit or drysuit. Species recorded around this area include California sea lions, Spanish shawls, guitarfish, eagle rays, leopard sharks, harbor seals, and California spiny lobsters.

Located near Two Harbors, this site features a mix of reef, kelp forest, and artificial reef topography. Divers access the area by boat, with sites typically located 1000 metres from shore. Depths range from 5 to 7 metres, with an average of 10 metres. Conditions are variable, with visibility ranging from 6 to 24 metres and water temperatures between 15C and 20C. Due to thermoclines, temperatures can drop significantly in deeper water, making a 7mm wetsuit or drysuit advisable. Hazards include cold water, depth, entanglement, low visibility, and surge. Facilities available in the area include air fills, equipment rental, and guided tours.

Indian Rock, located off the West End of Santa Catalina Island near Two Harbors, features a central rock formation surrounded by shallow reefs and kelp forests. The site is suitable for beginners, with depths ranging from 5 to 45 metres and an average depth of 10 metres. Snorkellers can observe common Garibaldi, as well as less frequently encountered species including Leopard Shark, California Moray, Spanish Shawl, Horn Shark, Harbor Seal, and Guitarfish. California Spiny Lobster and various wrasses are also present. Entry is possible by both shore and boat. Visibility varies between 5 and 25 metres, and currents are generally mild. Be aware of boat traffic in the area.

Lions Head is a marine reef and kelp forest site located near Two Harbors on Santa Catalina Island. Divers can explore depths ranging from 6 to 30 metres, with visibility typically between 10 and 20 metres. The site is suitable for beginners and features mild currents, though divers should remain aware of surge and boat traffic. Marine life frequently recorded here includes common Kelp Bass and various snails, alongside uncommon sightings of California Sea Lions, Horn Sharks, Spanish Shawl nudibranchs, Garibaldi, California Moray eels, and California Spiny Lobsters. Other species present include Scorpionfish, Atlantic Pyrosomes, Klipfish, Grunts, Sea Stars, and Copper Rockfish. Access to this site requires a boat.