Lake Austin Austin Open Water Swimming

Lake Austin is a narrow reservoir on the Colorado River between Lake Travis and Lady Bird Lake in Austin, Texas. The lake stretches approximately 22 miles upstream from Tom Miller Dam to Mansfield Dam. Emma Long Metropolitan Park provides public swimming access on the lake’s northern shore with beach areas, picnic facilities, restrooms, and boat ramps. The park requires a day-use fee for entry. Other access points exist along the lake, though many shoreline areas are privately owned. Lake Austin experiences less wind and wave action compared to the larger Lake Travis, making it popular for recreational swimming. The lake is downstream from Mansfield Dam, so water releases can create current conditions that swimmers should monitor.

Lake Austin serves as a training venue for the Austin Triathlon Club and local swimmers seeking alternatives to the more crowded Barton Springs. The lake provides year-round swimming opportunities, though it attracts fewer crowds than Lake Travis. Multiple access points along the lake allow swimmers to choose locations based on current conditions and preferences. The narrower, more protected nature of Lake Austin compared to Lake Travis can provide calmer water when wind affects the larger lake. Local swimmers appreciate the lake’s proximity to central Austin combined with a more natural swimming environment compared to pools.

Water temperatures vary seasonally, typically ranging from the 60s in winter to the 80s Fahrenheit in summer. Dam releases from Mansfield Dam upstream can affect water levels and create current, so swimmers should be aware of flow conditions. The Texas Commission on Environmental Quality monitors Highland Lakes for bacteria and harmful algal blooms. Swimming is at your own risk with no lifeguards on duty at most locations. The lake’s depth requires appropriate swimming ability and caution. Always check current water conditions, weather forecasts, and dam release schedules before swimming.