This is a great place for a walk/run, and the place I was staying in Travis Heights was just up the hill from the access on E. Riverside Drive.

The Boardwalk is 'decorated' with 36 belts - all inscribed with a lyric written by a Texas musician. Entertaining and perfect for the space; they are completely unobtrusive as they lay fairly flat against the railing. FYI, I am not so great at Texas songwriter lyric trivia.

http://www.austinrelocationguide.com/Boardwalk-Trail-at-Lady-Bird-Lake/