Save This Event For Later 2018 Texas Mtn. Bike Championship Series Rules Signoff Austin, TX, Sat May 19 - Sun May 20, 2018 Contact Event | Event Website | Google Calendar Start line address: 1100 Congress Ave., Austin, TX 78701 Presented by TMBRA (Texas Mtn. Bike Racing Assoc.) This is a past event. If you wish to see the details for this event click, "Continue" below. If you are looking for a current event, please search the event calendar .