Falcon Cove is a marine reef site located off the Oregon Coast near Arch Cape. The underwater topography consists of polished cobblestones and large basalt slabs. Divers can expect shallow depths ranging from 1 to 5 metres, with an average of 2 metres. Conditions are variable, featuring moderate currents, surge, and visibility between 3 and 10 metres. Marine life observed at the site includes Ochre Sea Stars and snails, alongside less frequent sightings of Monterey Dorids, Northern Leopard Dorids, Sea Nettles, Common Moon Jellyfish, and various crab species. Due to cold water, surf, and rip currents, this site is suited for intermediate divers. Shore entry is required.

Neahkahnie Tide Pools are located at the northern end of Manzanita Beach, where the mountain base forms a series of rocky channels. This shallow reef site is suitable for beginners, with an average depth of one metre and a maximum of two metres. Access is via the shore, and the site features mild currents. Visibility typically ranges from five to fifteen metres. Water temperatures are cold year-round, ranging from 9C to 14C, necessitating the use of wetsuits. Hazards include cold water, rip currents, surge, and surf. Parking is available for visitors. The site is best suited for those comfortable with intertidal environments.

Arch Rock is a marine reef site located at the southern end of Arch Cape beach, defined by a prominent sea stack featuring a natural arch. The topography consists of the base of the rock and surrounding boulder fields, which create crevices. This site is suitable for advanced snorkellers due to challenging conditions, including strong currents, surf, and low visibility. Water temperatures are consistently cold, ranging from 9 to 15C, necessitating the use of a wetsuit or drysuit. Shore access is available, and parking is provided for visitors. Due to the environmental hazards, this site requires careful planning and experience in cold water conditions.

Castle Rock is a massive basalt sea stack situated approximately 805 metres offshore from the Oregon Coast. This site features deep vertical walls and is suitable for advanced divers and snorkelers. Access is available via boat or kayak. Conditions at the site vary, with visibility ranging from 5 to 40 metres and water temperatures between 9C and 15C. Divers should be prepared for moderate currents, surge, and surf. Due to the exposed nature of the location, hazards include boat traffic, cold water, and low visibility. The site is rated 4/5 for snorkelling, though its advanced nature requires careful planning and experience.

Hug Point is a dramatic coastal site featuring sandstone caves and basalt reefs that become accessible at low tide. Snorkellers can explore the submerged portions of rocky fingers extending into the surf. The site is rated for intermediate snorkellers due to moderate currents and surf conditions. Shore entry is required, and visitors should be aware of hazards including rip currents, strong currents, and entanglement risks. Facilities at the site include parking, toilets, showers, changing rooms, and a rinse station. The water temperature varies between 9C and 15C throughout the year.

Lion Rock is a distinctive sea stack located off the Oregon Coast near Cannon Beach. This shore-entry site features shallow rocky reefs with depths ranging from 1 to 8 metres, averaging 4 metres. The base of the rock is characterised by deep crevices containing algae and small crustaceans. Conditions vary, with visibility typically between 3 and 10 metres and mild currents. Due to the environment, snorkelers must be aware of hazards including cold water, jellyfish, rip currents, sea urchins, and surf. The site is suitable for beginners, though it is best accessed during calm summer swells. Typical snorkel duration is approximately 30 minutes.

Silver Point Reefs is a shore-entry site located south of the main beach in Cannon Beach. The topography consists of submerged rocky nubs and the prominent Jockey Cap Rock. Divers should expect moderate currents and surge, with visibility typically ranging between 3 and 5 metres. Water temperatures fluctuate between 9C and 15C throughout the year. Due to the presence of rip currents, deep water, and strong surge, this site is suitable only for advanced divers. Snorkelling is generally not recommended here, with a rating of 2 out of 5.

Nehalem North Jetty (River Side) is an artificial reef site located on the Oregon Coast. The rocky substrate of the jetty provides a habitat for various marine life. Divers should be aware of strong currents, surge, and boat traffic, with visibility often ranging between 2 and 8 metres. Depths at this site typically vary from 2 to 18 metres, with an average of 10 metres. Due to the challenging conditions, this site is suited for advanced divers. Snorkeling is possible but rated 2/5, and is only recommended during slack tide in calm conditions to avoid the hazards of the jetty bar.