Saltwater State Park features Washington's only state-managed underwater artificial reef. The site consists of a reef and kelp forest environment accessible via a sandy beach entry. Divers should be prepared for a significant surface swim of approximately 274 metres to reach the main reef structure. Depths at this location range from 15 to 20 metres, with an average depth of 18 metres. Conditions include mild currents and visibility ranging from 5 to 15 metres. Due to the cold water, potential for low visibility, and currents, this site is best suited for intermediate divers. Facilities available at the park include parking, toilets, showers, a rinse station, and a cafe.

Three Tree Point in Puget Sound offers a diverse underwater environment featuring a sandy bottom interspersed with artificial reef structures and seagrass beds. Divers can explore depths ranging from 2 to 29 metres, with an average depth of 18 metres. The site is accessible via a shore entry and is suitable for beginners, though divers should be aware of cold water, boat traffic, and potential currents. Marine life is abundant, with very common sightings of East Pacific Red Octopus and various shrimp. Other frequent residents include White-lined Dirona, Hermissenda, Lumpfish, and the Monterey Dorid. Night diving is a popular activity here, with typical dives lasting around 70 minutes.

Les Davis Pier is an artificial reef site in the United States offering shore access for divers. The site features a depth range of 4 to 40 metres, with an average depth of 18 metres. Conditions are variable, with visibility ranging from 2 to 10 metres and moderate currents. Divers should be aware of hazards including boat traffic, cold water, entanglement risks, and potential overhead environments. The site is suitable for beginners and supports night diving, with typical dive times around 45 minutes. Facilities available at the location include parking, toilets, a dive shop, and guided tours.

Sunrise Beach Park in Puget Sound features a rocky reef and wall system that begins in shallow water. Divers can explore depths ranging from 9 to 32 metres, with an average depth of 14 metres. The site is accessible via both shore and boat entries, located 68 metres from the shore. Conditions are variable, with strong currents and potential for cold water intrusions and thermoclines. Due to the depth and current, this site is suited for intermediate divers. Hazards include boat traffic, down currents, and the risks associated with deep diving. Facilities at the park include parking and toilets.

Titlow Beach is a shore-entry site near the Tacoma Narrows, characterised by old ferry pilings that function as an artificial reef. The topography includes a shallow bottle field, popular for macro photography. Divers can expect depths between 7 and 13 metres, with an average of 10 metres. The site is subject to strong currents and boat traffic, making it suitable for intermediate divers. Marine life includes common sightings of Hermissenda, White-lined Dirona, Three-lined Aeolid, Branched Dendronotid, and various crabs. Rarer encounters include the East Pacific Red Octopus, Harbor Seal, and several species of jellyfish. Facilities at the site include parking, toilets, showers, and a cafe.

Day Island Wall is a technical wall dive located in the United States, dropping from 15 to 33 metres with an average depth of 24 metres. The site is characterised by strong currents throughout the water column and visibility ranging from 10 to 20 metres. Due to the significant depths and potential for nitrogen narcosis, advanced certification is required. Divers must manage decompression limits and remain vigilant for heavy boat traffic at the surface. Shore entries require navigating a surf break, while boat access is also available. Parking is provided at the site, allowing for pre-dive planning. Typical dive times are approximately 45 minutes.

Blake Island Reef is an artificial reef located in Puget Sound, United States. The site sits at depths ranging from 12 to 24 metres, with an average depth of 18 metres. Access is by boat only, and the site is suitable for intermediate divers. Conditions feature mild currents, though visibility is variable and can change quickly. Divers should be aware of entanglement risks associated with the artificial structures and maintain proper buoyancy control to avoid contact with the materials. Facilities available at the departure point include parking, toilets, showers, changing rooms, a rinse station, air fills, equipment rental, a cafe, first aid, a dive shop, boat charter, guided tours, and gear storage.

Harper's Pier in Puget Sound offers a shallow dive site featuring a combination of a natural reef, a wreck, and an artificial reef structure. Depths range from 1 to 9 metres with an average of 7 metres, providing an accessible environment for beginner divers. Visibility typically spans 5 to 10 metres, supported by mild currents. The site is accessible via both shore and boat entries. Divers should remain aware of boat traffic and potential entanglement hazards from debris or fishing lines. A surface marker buoy is recommended for safety. On-site facilities include parking, toilets, and a cafe, and night diving is permitted.