If you're in Round Rock, I just received an email soliciting feedback for the upcoming 224 acre Behrens Ranch Metro Park that is currently in development:
https://publicinput.com/5980
You can rank your priorities, so you can put "Trails" at the top in one question and "Mountain Bike Trals / Singletrack" at the top for another question. And there's a comment section at the end, where I mentioned it sure would be nice to have some mountain biking trails in Round Rock (there's pretty much nothing now, perhaps some of the eastern stuff at Brushy Creek is in Round Rock, but most if not all of it is in Cedar Park).
..Al