Capital of Texas Triathlon 7 years ago ID: #4548 Listed In : Sports 420 W Riverside Dr , Austin. TX, USA 78704 (512) 350-9178 Business Description Capital of Texas Triathlon, Address : 420 W Riverside Dr , Austin. TX, USA 78704, Phone : (512) 350-9178 Reviews & Ratings Write a Review No Review. Please login / register to add your review.