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.

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.

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.

Submarine Rock, located within Ecola State Park, is a shore-entry site featuring a large offshore monolith. This structure creates a semi-sheltered lee side, providing a base for a rocky reef and dense kelp forest. Divers should be prepared for water temperatures ranging from 9C to 15C throughout the year. The site is suited for intermediate divers due to potential hazards including surf, rip currents, and entanglement risks. Facilities at the location include parking, toilets, showers, changing rooms, and a rinse station. Guided tours and a dive shop are available to support visitors exploring this cold-water environment.

Indian Beach in Ecola State Park offers a rocky reef and kelp forest environment suitable for intermediate snorkellers. The site features a rocky area at the south end known as the Garden, which provides a sheltered zone for observation. Depths range from 0 to 10 metres, with shore access available. Water temperatures fluctuate between 9 and 15C, necessitating a wetsuit. Divers and snorkellers may encounter Ochre Sea Stars, snails, rock crabs, and striped shore crabs. Less frequent sightings include Monterey Dorids, Northern Leopard Dorids, and various jellyfish species. Be aware of hazards including surf, surge, rip currents, low visibility, and entanglement in kelp.

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.

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.