Quick FactsOverview
About Hamilton Pool Preserve
Hamilton Pool Preserve, Texas is a Travis County nature preserve west of Austin containing one of the most photographed natural swimming holes in Texas, formed when the dome of an underground river collapsed due to erosion over thousands of years. The result is a jade-green pool at the base of a U-shaped grotto with a nearly 50-foot waterfall fed by Hamilton Creek. The preserve covers 232 acres.
Travis County purchased the land from the Reimers family in 1985 after the Texas Parks and Wildlife Department cited it as the most significant natural area in rural Travis County in 1980. A land management program has since restored fern-lined cliff faces and native upland meadows following decades of unregulated use and grazing. The Tonkawa and Lipan Apache peoples lived in the area before European settlement, and the pool takes its name from Morgan C. Hamilton, who owned the property in the 1860s.
Swimming is permitted only when bacteria levels and recent rainfall are acceptable and is not guaranteed with any reservation. The water temperature drops below 50 degrees Fahrenheit in winter and spring. Natural hot springs in Texas of this geological character are rare, and Hamilton Pool stands apart from other Hill Country swimming destinations near Austin for its collapsed grotto formation and 50-foot waterfall.
Location & Access
Getting to Hamilton Pool Preserve
Hamilton Pool Preserve is located at 24300 Hamilton Pool Road, approximately 23 miles west of Austin off Highway 71. From Austin, take TX-71 West, turn left onto Hamilton Pool Road, and follow it roughly four miles to the park entrance. The drive takes around 30 to 40 minutes. From Dripping Springs, take FM 3238 west and connect to Hamilton Pool Road.
Reservations are required and must be made in advance through the Travis County Parks online system. Each reservation covers up to eight people and one vehicle. Walk-ins are not accepted when the park is at capacity. The entrance fee is paid at booking. A parking area is at the entrance, and from there the trail to the pool is a quarter mile each way. For visitors seeking natural hot springs near Austin with a scenic grotto experience, Hamilton Pool is the most distinctive geological swimming destination in the Austin-area Hill Country.
The trail from the parking lot to the pool is steep, narrow, and rugged with uneven steps, taking approximately 15 minutes each way. Sturdy closed-toe footwear is required; sandals and flip-flops are strongly discouraged by the park. No pets are permitted under any circumstances, including pets in vehicles. The preserve is open year-round for hiking and sightseeing regardless of swimming status. Swim availability is posted on the Travis County Parks website and must be checked before every visit.
Suitability & Accessibility
Who Hamilton Pool Preserve Is Suitable For
Hamilton Pool Preserve suits adults and older children who are comfortable on steep, uneven terrain and who understand that swimming is not guaranteed on any visit. The combination of the dramatic grotto, the waterfall, and the fern-covered cliffs makes it a compelling destination even when the pool is closed for swimming. Visitors who come primarily for the visual experience and the short hike will find it worthwhile regardless of swim status.
The preserve is not wheelchair accessible. The official park page describes the trail as steep, narrow, and rugged with uneven steps, and there are no accessible alternatives to reach the pool. Families with young children should be aware that the trail requires confident footing and that the pool has no lifeguard on duty.
For those seeking natural hot springs in Texas that prioritize dramatic scenery and geological character over warm soaking temperature, Hamilton Pool is arguably the most photogenic natural swimming hole near Austin. The water can be very cold in winter and spring, making it best suited to warm-weather visits or cold-water swimmers in cooler months. Checking the swim status on the preserve's website before every visit is essential, as swimming is denied when bacteria levels are elevated following rainfall.
Safety & Etiquette
Safety and Etiquette at Hamilton Pool Preserve
Hamilton Pool Preserve is a site where visitors should be mindful of multiple overlapping hazards. There is no lifeguard on duty. Swimming is not permitted when bacteria levels are elevated, which can occur after any significant rainfall as runoff enters Hamilton Creek. Visitors must check the current swim status on the Travis County Parks website before traveling. Refunds are not accepted and no advance guarantee of swimming is provided with any reservation.
The trail to the pool is steep, narrow, and rugged with uneven steps. Sturdy closed-toe footwear is required. Sandals and flip-flops create a meaningful slip risk on the descent and return. The hike takes about 15 minutes each way and involves significant elevation change. Visitors with balance or mobility challenges should not attempt the trail. Children must be supervised closely on the trail and at the pool edge.
Water temperature can drop below 50 degrees Fahrenheit in winter and spring. Cold water shock is a real risk for swimmers who enter without acclimating in cooler months. Life vests are available at the pool while supplies last. The waterfall creates turbulence directly below it; swimmers should avoid that zone and stay in the calmer areas of the pool.
Pets are prohibited with no exceptions, including pets kept in vehicles. No glass is permitted on the property. Alcohol is not permitted. Visitors should leave the area as found, take all trash out, and stay on designated trails. The ecosystem at Hamilton Pool is actively being restored and fenced vegetation areas must not be entered.