Cullaby Lake, located south of Warrenton, is a freshwater site suitable for beginner snorkellers. The lake features a designated swimming area, with the most productive areas for observation found near the docks and lily pads. Depths range from the surface to 9 metres, with an average of 4 metres. Conditions are generally mild, though water temperatures fluctuate significantly, ranging from 7°C in April to 20.5°C in July. Shore access is available, supported by facilities including parking, toilets, showers, and a rinse station. Snorkellers should remain aware of potential hazards, including boat traffic, cold water, and entanglement in aquatic vegetation.

Gearhart Beach features an expansive sandy shoreline where snorkelers may explore shallow troughs located between sandbars. This site is best accessed during rare calm summer days when conditions allow for entry beyond the breakers. The water temperature at this location ranges from 8C to 15C throughout the year, requiring appropriate thermal protection. Due to the presence of surf and cold water, this site is rated for intermediate snorkelers. Shore access is available, with parking and toilet facilities provided nearby. Snorkeling activity is limited by the dynamic coastal environment, and visitors should exercise caution regarding local surf conditions.

The Silvia de Grasse is a shallow wreck site located off the Oregon Coast, United States. Resting at depths between 2 and 7 metres, the wreck requires boat access. Divers should be prepared for strong currents and limited visibility of approximately 5 metres, necessitating close proximity to the structure throughout the dive. Due to the variable conditions and current strength, this site is suited for intermediate divers with solid buoyancy control. Species recorded around this area include California sea lions, Steller sea lions, harbour seals, sea nettles, Pacific Lion's Mane jellyfish, rock crabs, and various snails. A drysuit or thick wetsuit with hood and gloves is recommended given the water temperatures of 8 to 15 degrees Celsius.

Painted Rock Beach is a shore-entry site featuring small rocky clusters that can be explored with a mask during flat ocean conditions. The site is shallow, with depths ranging from 1 to 5 metres and an average of 3 metres. Snorkellers may encounter common species such as sea nettles, ochre sea stars, rock crabs, and various snails. Less frequently, skates, Pacific lion's mane jellyfish, common moon jellyfish, opalescent inshore squid, and righteye flounder are recorded. Due to the cold water temperatures and potential for surf, surge, and rip currents, this site is best suited for beginners under calm conditions. Facilities include parking and toilets.

The Cove is a rocky reef site located three miles south of Gearhart. The topography consists of basalt boulders and tide pools, offering a shore entry for snorkelers. Depths range from 2 to 15 metres, with an average of 8 metres. Conditions are variable, with visibility typically between 5 and 15 metres depending on swell. Due to the presence of surf and surge, this site is suited for advanced snorkelers. Water temperatures fluctuate between 8C and 15C throughout the year. Facilities at the site include parking, toilets, and showers. Typical snorkel sessions last approximately 30 minutes.

Coffenbury Lake is a freshwater site situated within Fort Stevens State Park on the Oregon Coast. It offers sandy shore entries and calm water, making it a suitable location for beginners to practice snorkeling. The site experiences mild currents and visitors should remain aware of potential boat traffic. Water temperatures vary seasonally, ranging from 9C to 15C. Facilities available at the lake include showers. Species recorded around this area include California sea lions, harbour seals, Steller sea lions, sea nettles, Pacific Lion's Mane jellyfish, rock crabs, righteye flounder, ochre sea stars, snails, trout, livebearers, and striped shore crabs.

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.

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.