Rio Grande Valley Livestock Show Grounds is a Livestock auction house located in Mercedes, TX 78570. It is one of the 1 Livestock auction hice in United States. Address of Rio Grande Valley Livestock Show Grounds is 1000 N Texas Ave, Mercedes, TX 78570, United States. Rio Grande Valley Livestock Show Grounds can be contacted at 19565652456. Rio Grande Valley Livestock Show Grounds is located in a remote area, with less than 1 listed places around it. Rio Grande Valley Livestock Show Grounds is rated 4.5 (out of 5 stars) by 812 reviewers on the web.