I love Salt Lick! "Arguably the best BBQ in Austin: The Salt Lick. There are outposts in Round Rock and at the airport, but there's nothing like the original location in Driftwood, Texas (just a 30 minute drive from downtown Austin).
walking/running around the lake. Pfluger Bridge connecting the pedestrian and bike trails from Auditorium shores over Lady Bird Lake. It's also nicely lit up if you're the jaunty, night-time stroll type.