You can get alot of info at ROTrally.com,but it's the biggest rally in Texas.Tons of vendors,lots of live music,poker runs etc.It starts June 10 through the 13.They have a big parade (bikes only)that cruise past the Capitol of Texas with the gov.of Texas leading the parade that ends up on 6th street in Austin that is closed to bikes only.I forget the exact number but last year there wee around 60,000 bikes that showed up,but don't quote me on that.