The Twin Rivers CCI,CIC & H.T. Organizing Committee regrets to announce the death of Walterstown Don, a 16-year-old Irish Sport Horse gelding (Don Juan De La Bouverie x Walterstown Treacy VII) owned by Lauren Burnell and ridden by Rebecca Braitling. Walterstown Don was competing in the CIC3* division, collapsed during the cross-country phase between fences 18 and 19 and died of causes unknown at this time pending necropsy. Braitling was attended to on site and then was transferred to Sierra Vista Regional Medical for further care. The Organizing Committee of the Twin Rivers CCI,CIC & H.T. and the USEA wish to extend their deepest sympathy and condolences to all of the connections of Walterstown Don.