Southwest Williamson County Regional Park is a popular water park in Leander, Texas, offering 1 attractions for visitors of all ages. Looking for Southwest Williamson County Regional Park tickets, hours, and visitor reviews? You'll find everything you need below to plan your trip. Searching for a waterpark near you in Leander, Texas? Southwest Williamson County Regional Park is one of the closest local options for families and visitors looking to cool off during the warmer months. The park features 1 family attraction and a dedicated kids area with 1 splash feature. Visitors rate Southwest Williamson County Regional Park 4.6 out of 5 stars based on 5 reviews. Guests frequently highlight Affordable entry fee, Spacious and clean environment, Fun and engaging for kids as standout aspects of the experience. Affordable admission fee, spacious and clean environment, shaded picnic areas For the best experience, plan your visit during Thursday at opening to avoid the busiest periods. Southwest Williamson County Regional Park tickets are priced at $2 for adults and $2 for children, with season passes and online discounts often available. Booking tickets online in advance usually saves time at the gate and can shave a few dollars off the walk-up rate. Visit on weekdays, especially Wednesdays and Thursdays for larger groups, arrive at opening to avoid crowds, and bring snacks for a picnic