Hemlock Gorge is a shallow snorkelling site located below the dam near Prettyboy Reservoir. The area consists of shallow riffles and small pools shaded by hemlock trees. With an average depth of one metre and a maximum depth of two metres, it is suitable for beginners. Entry is via the shore. Conditions vary, with visibility typically ranging between one and four metres and moderate currents present. Snorkellers should be aware of potential entanglement hazards in the water. A typical session lasts approximately 30 minutes.

Bunker Hill is a deep pool located within the Maryland-Virginia Quarries near Prettyboy Reservoir. This freshwater site features a slower river flow, which allows for observation of the riverbed. Snorkellers can expect mild currents, though the water remains cold year-round, typically ranging between 45-50°F due to reservoir releases. The site is suitable for beginners and offers shore access. While specific sightings are not confirmed, the habitat supports various temperate freshwater fish and invertebrates typical of the region. Facilities at the site include parking and toilets. Due to the consistently low water temperatures, appropriate thermal protection is necessary for all visitors.

Hobo Beach at York Road Access offers a freshwater snorkeling experience within the Maryland-Virginia Quarries region. The site features a grassy bank entry leading into a deep, slow-moving section of the river. Depths at this location range from 8 to 39 metres. Water temperatures remain consistently cold, between 45 and 50 degrees Fahrenheit, due to the release from the nearby Prettyboy Reservoir. The site is suitable for beginners, though the deep water and cold temperatures require appropriate thermal protection. Facilities at the access point include parking and toilets. Typical sessions last approximately 45 minutes, with mild currents present throughout the area.

Hyde's Quarry is a freshwater site featuring artificial reef structures and wrecks. Divers access the water from the shore to explore depths ranging from 1 to 24 metres, with an average depth of 15 metres. Visibility typically spans 5 to 9 metres. The site presents hazards including cold water, entanglement risks, and overhead environments within the wrecks. A thermocline is present at 15 to 20 feet deep during August, and bottom temperatures can reach 5 to 6 degrees Celsius. Facilities available at the location include changing rooms, air fills, parking, and guided tours. Night diving is permitted at this site.

Pot Rocks is a freshwater canyon site located within the Maryland-Virginia Quarries. The site is defined by geological formations where the river has carved deep pots or holes into the bedrock. These underwater rock formations create a distinct topography for snorkellers to explore. The site is suitable for advanced snorkellers due to the presence of moderate currents and cold water conditions. Depths at this location range between 1 and 5 metres. Access to the water is via the shore, and parking facilities are available nearby for visitors.

Bainbridge Sportsmanship Club is a freshwater artificial reef site offering shore access. The site features a varied topography with depths ranging from 2 metres to 27 metres, providing an average depth of 12 metres. This layout allows beginners to explore shallower areas while more experienced divers can navigate the deeper sections. Visibility typically fluctuates between 6 and 15 metres. The site is generally free of current, making it suitable for buoyancy practice. Divers should be prepared for cold water conditions and significant depths. On-site facilities include toilets, showers, and a dive shop providing air fills.

Bainbridge Quarry is a freshwater artificial reef site located in the United States near Lakes. The site features a sunken road that remains at a shallow depth of under 6 metres, making it suitable for beginner snorkellers. Depths across the quarry range from 6 to 36 metres, with an average depth of 6 metres. Visibility at the site typically varies between 6 and 15 metres. Shore entry is available for water access. On-site facilities include toilets, showers, a dive shop, and air fills for visiting divers and snorkellers.

Juturna Springs is a freshwater quarry located in Woodsboro, Maryland, offering shore-entry diving for beginners. The site features depths ranging from 6 to 67 metres, with an average depth of 12 metres. Divers should be prepared for a significant thermocline occurring between 6 and 7 metres, where temperatures drop from approximately 25-26°C at the surface to 5-6°C at 20 metres. Conditions include mild currents and visibility typically between 2 and 9 metres. Hazards include cold water, deep sections, and low visibility. On-site facilities include parking, toilets, showers, air fills, gear storage, equipment rental, and guided tours.