Mardi Gras River Parade & Festival February 18th from 11:00am-7:00pm - La Villita and The Arneson River Theatre. A procession of decorated river barges will transform the San Antonio River Walk into a floating Bourbon Street. Krewes of costumed revelers & live entertainment will celebrate Mardi Gras San Antonio Style! Enjoy live music on Arneson Stage from 11am to 7pm, and a festival of food, arts & crafts, activities and more at La Villita. Parade will take place 3pm-5pm. Free to the public.