I like to fish McKinney Falls SP, wading upstream. Perfect creek for it. Never been to McKinney Rough, I don't think.
The green belt is fun during the week...weekends are brutal!
My daughter and son-in-law live in Austin and I play disc golf with them. Some great courses there that include some fun trails.
So much outdoorsie stuff in and around Austin. We based out of Wimberly a couple weeks ago and found some fun hiking. Jacob's Well is "ok". The creek downstream is very nice! Just don't get near the banks else land owners get feisty.
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paul, texas KD5IVP