The day starts at the Barton Springs Picnic lot, where a row of non-electric hybrid bikes waits under the modest shade of live oaks and guides adjust helmets with calm efficiency. Cyclists push off onto the smooth ribbon of the Ann and Roy Butler Hike-and-Bike Trail; the lake mirrors the downtown skyline while joggers, dog walkers and kayaks carve the same stretch of morning light. The tour moves at a family-friendly tempo—stops at the Stevie Ray Vaughan statue, a slow roll across the old railroad bridge, a stretch of boardwalk over cattails—so you can listen to the guide’s short histories and snap pictures without feeling rushed.