Sewell Park in Lake Travis offers a freshwater snorkeling experience at the headwaters of the San Marcos Springs. The site features a shallow average depth of two metres, ranging between one and three metres, making it accessible for beginners. Snorkellers enter directly from the shore to explore the river environment. Conditions at this site vary, with visibility typically ranging from five to ten metres. Divers and snorkellers should be aware of potential hazards, including strong currents, boat traffic, and the risk of entanglement. Facilities available at the park include toilets, parking, equipment rental, and guided tours.

Blue Hole Regional Park in Lake Travis offers a freshwater diving experience within a spring-fed environment. The site features underwater cypress root systems and a depth range of 1 to 18 metres, with an average depth of 7 metres. Divers can expect mild currents and visibility typically between 10 and 20 metres. The water temperature remains consistent between 20 and 24 degrees Celsius throughout the year. Access is via a shore entry, making it suitable for beginners. Facilities available at the park include parking, toilets, and changing rooms. Due to the nature of the site, divers should be aware of deep areas.

Jacob's Well is a perennial karstic spring serving as the entrance to an extensive underwater cave system. The site features a vertical well structure with depths ranging from 1 to 9 metres, averaging 5 metres. Access is via the shore, and the water temperature remains a constant 20°C year-round. Visibility typically spans 10 to 20 metres. Due to the presence of an overhead environment, deep sections, and moderate currents, this site is suited for intermediate divers. Snorkellers can explore the surface well, which provides a distinct vertical perspective of the spring opening. Facilities available at the site include parking, toilets, and guided tours.

Overlook Park is a freshwater shore-entry site in Lake Travis featuring a drop-off that descends from 3 to 24 metres. With an average depth of 13 metres and mild currents, the site is suitable for beginner divers. Visibility typically ranges between 3 and 9 metres. Divers should be aware of thermal stratification during summer months, with a distinct thermocline occurring between 8 and 10 metres. Submerged vegetation is present in shallower sections, presenting a potential entanglement hazard. Divers are advised to streamline their equipment to avoid snagging on weeds. On-site facilities include parking and showers for post-dive convenience.

North Park in Lake Travis offers a freshwater diving experience featuring a wall, muck terrain, and artificial reef structures. The site is suitable for beginners, with depths ranging from 1 to 11 metres. Divers can navigate between three training platforms connected by underwater lines. Entry is via a shore walk that is steep and rocky, requiring sturdy footwear. Visibility is consistently 5 metres, and currents are mild. The site provides facilities including parking, toilets, showers, changing rooms, air fills, and guided tours. The habitat supports various temperate freshwater fish and aquatic vegetation. Hazards include potential entanglement and low visibility.

Skyline is an artificial reef site located in Lake Travis, offering a shore-entry experience suitable for beginner divers. The site features a structure spanning depths of 1 to 15 metres, with an average depth of 8 metres. Conditions are generally calm with no current, providing a relaxed environment for buoyancy practice. Visibility typically ranges between 3 and 6 metres, and the use of a dive torch is recommended to observe life within the reef structure. Species recorded around this area include longnose gar, blue tilapia, small mouth bass, common carp, channel catfish, and various sunfish species.

Lower Comal River is a freshwater drift dive located in the United States. Divers experience a moderate current that carries them through the water column, which ranges from 3 to 15 metres in depth with an average of 5 metres. Visibility varies significantly, ranging from 5 to 35 metres. Entry is via the shore, and parking is available on-site. The site is suitable for beginners, though divers must exercise caution regarding potential entanglement risks from submerged structures and vegetation. Additionally, the river contains overhead environments that require proper training and equipment to navigate safely. Night diving is permitted, with typical dives lasting approximately 30 minutes.

The Comal River offers a gentle, spring-fed drift dive suitable for beginners. Divers navigate depths between 1 and 5 metres, with an average of 2 metres, carried by a mild current. The riverbed features dense aquatic meadows of Cabomba, Vallisneria, and Ludwigia. Divers frequently encounter livebearers, snails, blue tilapia, small mouth bass, redbreast sunfish, and blue gill. Visibility is variable, ranging from 2 to 11 metres, and can decrease following heavy rain or high river traffic. Shore entry is standard for this 15-minute drift. Divers must exercise caution regarding buoyancy and entanglement risks when passing through thick vegetation.