Bring your family and friends to the 19th annual Artpace Chalk It Up, a free festival of contemporary art that transforms Downtown San Antonio into a gallery – from the ground up. This year’s theme celebrates the San Antonio River! Artpace Chalk It Up will take place on Houston Street, between N Flores and N Presa. Chalk It Up turns Downtown San Antonio into a chalk canvas, showcasing San Antonio-based artists and raising funds for Artpace's education and public programs. Chalk It Up encourages everyone to become an artist for a day as we work on a collaborative city block-sized mural.