Barton Springs Pool Austin Open Water Swimming

Barton Springs Pool in Austin measures three acres in size, making it the largest natural metropolitan pool in the United States. Fed by underground springs from the Edwards Aquifer, the pool maintains a constant temperature of 68-70 degrees Fahrenheit year-round, enabling swimming in all seasons. The pool features uniform concrete sides along its 1,000-foot length, creating an ideal lap swimming environment. Located within Zilker Park, the pool is accessible via Barton Springs Road with parking available in the park. Facilities include restrooms, changing rooms with showers, and a bathhouse. Lifeguards are on duty during operational hours. An admission fee is charged for entry, with discounts available for Austin residents. The pool is drained periodically for cleaning and maintenance.

The pool attracts a dedicated community of year-round swimmers and serves as a training venue for Austin area swimming groups and triathlon clubs. The consistent water temperature and measured distance make it particularly popular for training swims. Many swimmers visit daily for exercise, with the pool accommodating lap swimmers, recreational swimmers, and families. The natural spring-fed environment creates a unique swimming experience within an urban setting. The pool’s popularity means it can be crowded during peak hours and warm weather months.

Water quality is monitored regularly by the City of Austin, with the spring-fed nature of the pool providing naturally filtered water. The Edwards Aquifer system feeding the pool is protected, helping maintain water clarity and quality. The pool can experience temporary closures due to high bacteria levels after heavy rainfall events that affect the aquifer. During algae blooms or water quality issues, the pool may close until conditions improve. Check the City of Austin’s website or call ahead to verify the pool is open before visiting. Swimming is permitted only during posted operational hours when lifeguards are on duty. The natural environment means aquatic vegetation and small fish are present in the pool.