The San Antonio River Foundation is excited to announce a brand new event to San Antonio. River Relay is a thrilling and spectator friendly event that the entire city will enjoy, join the fun! Kayakers will travel 3-miles down the scenic San Antonio River before tagging their partner. Then the other team member will run 5k back to the starting point. For those who do not want to kayak, there will be a 5k run starting and ending at Confluence Park. Everyone is welcome to enjoy the after-race celebration at Confluence Park!