I haven't, but my brother has. He rock climbs. He has a bunch of climbing gear and goes out there every once in a while. He's climbed up the side of the main dome along the main climbing route, which is something like 300 feet up.
This is my brother on "E-Rock" as he calls it.
He also climbs along the greenbelt. I've done some climbing on the greenbelt also, but my brother is way more into it. He also went on a climbing trip with some friends to Missouri and Arkansas a few years back.
This is on the greenbelt somewhere along Barton Creek.
This is Reimer's Ranch. It's a park that Travis County bought several years ago from a family who had owned the land for several generations and wanted it protected. I think eventually they'll have 1,500 acres along the Pedernales River adjoining Hamilton Pool.