May 2-3 Austin TX. 22nd Annual Lonestar Round Up at Travis County Expo Center – 7311 Decker Lane. The Lonestar Round Up is a huge outdoor car show and live music festival featuring vintage hot rods and custom cars driven to Austin from all over the country by folks on an annual pilgrimage here from across the country. Held on the rolling grounds of the Travis County Expo Center just east of downtown Austin, the Lonestar Round Up is a unique celebration of cars, history, art, culture and music that the whole family will enjoy.