Flat Rock is a freshwater reef site located near the SUNY Oswego campus in Lake Ontario. The site is defined by unique underwater limestone shelf formations that create crevices throughout the area. Accessible via a shore entry, this location is suitable for beginners. Divers and snorkellers should be prepared for cold water temperatures, which range from 3°C to 23°C throughout the year. The site features shallow water and mild currents. Facilities available at the site include parking, showers, toilets, changing rooms, and a rinse station. The habitat supports various temperate freshwater fish and invertebrates typical of the region.

Fair Haven Beach in the United States offers a freshwater snorkeling experience along a long sandy shoreline. The site features a gradual drop-off with depths ranging from 1 to 5 metres, averaging 3 metres. Snorkellers often explore the area near the breakwater piers, where rocky crevices provide habitat for temperate freshwater fish and invertebrates. Conditions vary, with visibility reaching up to 25 metres on calm days. Water temperatures fluctuate significantly between 3C and 23C, making a wetsuit necessary. Hazards include boat traffic, rip currents, and surf. Facilities at the site include parking, toilets, and showers.

Southwick Beach State Park offers a shore entry point into the St. Lawrence River. The site features a vast sandy beach and dunes, with depths ranging from 2 to 10 metres and an average of 6 metres. Conditions vary, with visibility between 3 and 15 metres and strong currents present. A significant thermocline exists, causing water temperatures to drop sharply below the surface. Due to the potential for strong currents, rip currents, and cold water, this site is best suited for those prepared for challenging freshwater conditions. Facilities at the park include parking, toilets, and showers.