Proposal Rock is a basalt sea stack situated off the Oregon Coast near Neskowin. This site features a natural keyhole arch and rocky shelves that form shallow tide pools. Snorkelling is best during negative low tides when the reef is submerged. Depths typically range from 1 to 3 metres, with an average of 2 metres. Marine life includes very common Ochre Sea Stars, common rock crabs and snails, and occasionally California Sea Lions, Sea Nettles, Pacific Lion's Mane Jellyfish, and Opalescent Inshore Squid. Access is via the shore, though users must navigate cool water temperatures between 10C and 14C, alongside potential hazards such as rip currents, surf, and jellyfish.

Siletz Reef is a protected marine area located 2400 metres offshore from Neskowin. This site features deep rocky habitats and kelp forests, extending to depths of 50 metres. Access is by boat, and the site is suited for advanced divers due to challenging conditions including strong currents, surge, and surf. Visibility varies between 2 and 12 metres, and water temperatures remain consistently cold, ranging from 8 to 10 degrees Celsius throughout the year. Divers and snorkellers should be prepared for cold water and low visibility environments.

Salmon River Estuary at Knight Park offers a brackish water snorkeling experience near Lincoln City. The site features seagrass beds and submerged logs, providing a sheltered environment compared to the open Pacific coast. Entry is via the shore, and the site is suitable for beginners, though conditions vary with mild currents. Snorkellers should be aware of potential hazards including surf and rip currents. While no species are confirmed at this exact location, species recorded around this area include the Ochre Sea Star, California Sea Lion, Harbor Seal, and various nudibranchs such as the Monterey Dorid and Hermissenda. Facilities at the site include parking and toilets.

Roads End in Lincoln City, United States, is a reef site defined by basalt rock formations and submerged lava islands. These structures create protected pockets within the marine environment. Divers and snorkellers should be prepared for cool water temperatures ranging from 10C to 13C throughout the year. The site is accessed from the shore, though it is located 1609 metres out. Conditions are variable, with visibility typically between 5 and 15 metres. Due to strong currents, rip currents, surge, and surf, this site is suited for intermediate divers. Hazards include an overhead environment and the presence of sharks. Facilities available include parking, toilets, showers, and equipment rental.

Chief Kiwanda Rock is a massive volcanic monolith located approximately 1600 metres offshore from Pacific City. The site features a submerged base that creates a vertical reef environment. Due to its exposed location, this site is strictly for advanced snorkelers and requires boat access, typically via dory boat. Conditions are challenging, characterised by strong currents, surge, and cold water temperatures ranging from 10C to 14C throughout the year. Divers and snorkelers must remain vigilant regarding boat traffic, rip currents, and the potential for entanglement. Wetsuits are essential for all water activities here to mitigate the risk of hypothermia.

Cape Kiwanda South Tide Pools, located at the southern base of the sandstone headland in Pacific City, offer shallow snorkeling opportunities over basalt shelves and deep crevices. This shore-entry site is suitable for beginners, with depths ranging from 0 to 2 metres and an average depth of 1 metre. Conditions vary, with mild currents and water temperatures between 10C and 14C. Hazards include cold water, low visibility, surf, and sea urchins. Parking and toilets are available at the site. Snorkelers should exercise caution due to the surf and the presence of sea urchins within the intertidal zone.

McPhillips Beach, located at the northern end of the Cape Kiwanda headland, offers a shore-entry reef dive suitable for intermediate divers. The site features rugged rock formations and sea stacks that create pockets for observing marine life. Divers frequently encounter Nanaimo Dorid, Ochre Sea Star, and various crab species, including Rock Crab and Northern Kelp Crab. Less common sightings include Monterey Dorid, Northern Leopard Dorid, Three-lined Aeolid, and King Crab. Conditions are variable with moderate currents, surf, and cold water temperatures ranging from 10C to 14C. Hazards include rip currents, sea urchins, and sharks. Toilets are available at the site. Snorkelling is possible with a rating of 3/5.

NW 15th Street is a localized rocky shelf situated within the sandy coastline of Lincoln City. This site features submerged rocky outcrops that support kelp and various invertebrates. Snorkeling here is best suited for intermediate participants due to the presence of surf, sharp coral, and mild currents. Access is via the shore, and the site is best explored when the ocean is exceptionally flat. Facilities available at the location include parking, toilets, showers, and a rinse station. Typical sessions last approximately 60 minutes, though conditions vary significantly.