Hippie Hollow Park, County park on Lake Travis in Austin, United States.

Hippie Hollow Park is a clothing-optional county park on the shore of Lake Travis in northwest Austin, Texas. It occupies a steep slope above the water, with limestone steps that are rugged in places; depending on the lake level, reaching the water may require some rock climbing.

The Travis County Parks Department took over management of this land in October 1983 and opened it officially two years later. Before that, the site bore the name McGregor County Park.

The name emerged after the Woodstock era and reflects social changes when people began practicing textile-free recreation here. The designation points to the counterculture of the late 1960s and early 1970s.

Visitors must be 18 or older, and signs at the entrance warn that nude swimming and sunbathing may be encountered. The park lies on a steep slope above Lake Travis with limestone steps that are rugged in places; reaching the water can require rock climbing depending on the lake level. Wear sturdy shoes.

This site is the only legally recognized clothing-optional public park in the entire state of Texas. Legislation permits this use nowhere else within state borders.