Hamilton Pool Preserve is a Travis County Park with a waterfall, pool and creek. Reservations are required to enter the park. LAURA SKELDING/AMERICAN-STATESMAN

Want to dip a toe in Hamilton Pool this summer? Better make a reservation soon.

You may recall that Hamilton Pool Preserve, home of one of the state’s most popular natural swimming holes, instituted a reservation system two years ago. Travis County commissioners implemented the system after overcrowding problems at the park and traffic snarls on Ranch Road 12.

Reservations are needed between March 1 and Oct. 31, and on weekends and holidays during November and December.

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Reservations are open for the rest of the year at Hamilton Pool Preserve. LAURA SKELDING/AMERICAN-STATESMAN

Cost is $10 for the reservation plus a $1 service fee, paid online with a credit card, and an additional $15 entrance fee that must be paid at the pool (cash or local check, no credit card). After you make your online reservation, print your receipt or save it on your cell phone and bring it with you to the park.

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Reservation periods are from 9 a.m. until 1 p.m. and 2-6 p.m. One vehicle is allowed per reservation; no pets allowed. Fees are non-refundable and swimming is not guaranteed.

The hiking trail from the parking area at Hamilton Pool Preserve to the pool is a quarter mile long, steep and rocky.

To make a reservation, go here. For up-t0-date information about the park, call the information line at 512-264-2740 or go here.

The Hays County-owned Jacob’s Well swimming hole near Wimberley adopted a similar reservation system in 2015.