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.

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.

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.

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.

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.

Haystack Rock is a prominent basalt formation featuring submerged ledges and tide pools. Snorkelling is best conducted during high slack tide along the western face of the rock. The site reaches depths of up to 45 metres, though conditions are variable. Water temperatures range from 9C to 14C, and the environment is characterised by strong currents, surf, and rip currents. Due to the cold water and challenging conditions, this site is suited for intermediate snorkellers. Shore access is available, with parking and toilets provided near the site. Guided tours are also available for those navigating the area.

Short Sand Beach is a sheltered reef site located within Oswald West State Park on the Oregon Coast. The northern rocky edge near Blumenthal Falls provides protection from prevailing winds and features kelp patches. Snorkellers can expect depths ranging from 1 to 10 metres, with an average depth of 5 metres. Visibility reaches up to 12 metres, though conditions vary. Access is via the shore. The site is suitable for beginners, though users should be prepared for cold water temperatures between 9 and 14C, moderate currents, surf, and surge. Hazards include jellyfish, sea urchins, and low visibility. Facilities available include parking, toilets, showers, changing rooms, and a rinse station.

Bird Rocks, located at the northernmost point of Cannon Beach, is a reef site suited for advanced divers due to challenging conditions. The site is accessed from the shore and is subject to strong currents, surge, and surf. Visibility typically ranges from 5 to 15 metres, and water temperatures fluctuate between 9C and 15C throughout the year. Given the exposed nature of the point, snorkeling is only feasible during extreme low tides or exceptionally calm sea states. Divers should be prepared for cold water and potential rip currents. Parking is available near the site.