the guys at austin cycle camp are a good bunch to tie into.
Bicycle sport shop on 183/ Braker ( not far from you ) is a good shop and they are starting back up their Sat AM ride- 8:30 AM start - 25-30 miles and pretty hilly. Come on out and check the BSS ride. I am going to do it a few times a month, and helping get it ramped back up. I will be on a Fuji and in BSS kit. Mention to me you had posted on BF.
The violet crown one is longer 50+ miles usually.
It also depends on what type of rides you are looking to do.